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id="vector-main-menu-dropdown-label" for="vector-main-menu-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-menu mw-ui-icon-wikimedia-menu"></span> <span class="vector-dropdown-label-text">Prif ddewislen</span> </label> <div class="vector-dropdown-content"> <div id="vector-main-menu-unpinned-container" class="vector-unpinned-container"> <div id="vector-main-menu" class="vector-main-menu vector-pinnable-element"> <div class="vector-pinnable-header vector-main-menu-pinnable-header vector-pinnable-header-unpinned" data-feature-name="main-menu-pinned" data-pinnable-element-id="vector-main-menu" data-pinned-container-id="vector-main-menu-pinned-container" data-unpinned-container-id="vector-main-menu-unpinned-container" > <div class="vector-pinnable-header-label">Prif ddewislen</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-main-menu.pin">symud i'r bar ochr</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-main-menu.unpin">cuddio</button> </div> <div id="p-navigation" class="vector-menu mw-portlet mw-portlet-navigation" > <div class="vector-menu-heading"> Panel llywio </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-mainpage" class="mw-list-item"><a href="/wiki/Hafan" title="Ymweld â'r Hafan [z]" accesskey="z"><span>Hafan</span></a></li><li id="n-portal" class="mw-list-item"><a href="/wiki/Wicipedia:Porth_y_Gymuned" title="Pethau i'w gwneud, adnoddau a thudalennau'r gymuned"><span>Porth y Gymuned</span></a></li><li id="n-cafe" class="mw-list-item"><a href="/wiki/Wicipedia:Y_Caffi"><span>Y Caffi</span></a></li><li id="n-currentevents" class="mw-list-item"><a href="/wiki/Categori:Materion_cyfoes" title="Gwybodaeth yn gysylltiedig â materion cyfoes"><span>Materion cyfoes</span></a></li><li id="n-recentchanges" class="mw-list-item"><a href="/wiki/Arbennig:RecentChanges" title="Rhestr y newidiadau diweddar ar y wici. [r]" accesskey="r"><span>Newidiadau diweddar</span></a></li><li id="n-randompage" class="mw-list-item"><a href="/wiki/Arbennig:Random" title="Llwytho tudalen ar hap [x]" accesskey="x"><span>Erthygl ar hap</span></a></li><li id="n-help" class="mw-list-item"><a href="/wiki/Wicipedia:Cymorth" title="Tudalennau cymorth"><span>Cymorth</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> <a href="/wiki/Hafan" class="mw-logo"> <img class="mw-logo-icon" src="/static/images/icons/wikipedia.png" alt="" aria-hidden="true" height="50" width="50"> <span class="mw-logo-container skin-invert"> <img class="mw-logo-wordmark" alt="Wicipedia" src="/static/images/mobile/copyright/wikipedia-wordmark-cy.svg" style="width: 7.5em; height: 1.125em;"> <img class="mw-logo-tagline" alt="" src="/static/images/mobile/copyright/wikipedia-tagline-cy.svg" width="120" height="13" style="width: 7.5em; height: 0.8125em;"> </span> </a> </div> <div class="vector-header-end"> <div id="p-search" role="search" class="vector-search-box-vue vector-search-box-collapses vector-search-box-show-thumbnail vector-search-box-auto-expand-width vector-search-box"> <a href="/wiki/Arbennig:Search" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only search-toggle" title="Chwilio Wicipedia [f]" accesskey="f"><span class="vector-icon mw-ui-icon-search mw-ui-icon-wikimedia-search"></span> <span>Chwilio</span> </a> <div class="vector-typeahead-search-container"> <div class="cdx-typeahead-search cdx-typeahead-search--show-thumbnail cdx-typeahead-search--auto-expand-width"> <form action="/w/index.php" id="searchform" class="cdx-search-input cdx-search-input--has-end-button"> <div id="simpleSearch" class="cdx-search-input__input-wrapper" data-search-loc="header-moved"> <div class="cdx-text-input cdx-text-input--has-start-icon"> <input class="cdx-text-input__input" type="search" name="search" placeholder="Chwilio Wicipedia" aria-label="Chwilio Wicipedia" autocapitalize="sentences" title="Chwilio Wicipedia [f]" accesskey="f" id="searchInput" > <span class="cdx-text-input__icon cdx-text-input__start-icon"></span> </div> <input type="hidden" name="title" value="Arbennig:Search"> </div> <button class="cdx-button cdx-search-input__end-button">Chwilio</button> </form> </div> </div> </div> <nav class="vector-user-links vector-user-links-wide" aria-label="Offer personol"> <div class="vector-user-links-main"> <div id="p-vector-user-menu-preferences" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-userpage" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <nav class="vector-appearance-landmark" aria-label="Gwedd"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Newidiwch ymddangosiad maint ffont, lled a lliw y dudalen" > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" class="vector-dropdown-checkbox " aria-label="Gwedd" > <label id="vector-appearance-dropdown-label" for="vector-appearance-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-appearance mw-ui-icon-wikimedia-appearance"></span> <span class="vector-dropdown-label-text">Gwedd</span> </label> <div class="vector-dropdown-content"> <div id="vector-appearance-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div id="p-vector-user-menu-notifications" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_cy.wikipedia.org&uselang=cy" class=""><span>Rhoi</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Arbennig:CreateAccount&returnto=Prism+%28geometreg%29" title="Rydym yn argymell eich bod yn creu cyfri ac yn menwgofnodi. Fodd bynnag, dydy hyn ddim yn orfodol" class=""><span>Creu cyfrif</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Arbennig:UserLogin&returnto=Prism+%28geometreg%29" title="Fe'ch anogir i fewngofnodi, er nad oes rhaid gwneud. [o]" accesskey="o" class=""><span>Mewngofnodi</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Rhagor o opsiynau" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Offer personol" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Offer personol</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="Dewislen defnyddiwr" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_cy.wikipedia.org&uselang=cy"><span>Rhoi</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Arbennig:CreateAccount&returnto=Prism+%28geometreg%29" title="Rydym yn argymell eich bod yn creu cyfri ac yn menwgofnodi. Fodd bynnag, dydy hyn ddim yn orfodol"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Creu cyfrif</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Arbennig:UserLogin&returnto=Prism+%28geometreg%29" title="Fe'ch anogir i fewngofnodi, er nad oes rhaid gwneud. [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Mewngofnodi</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Tudalennau ar gyfer golygyddion allgofnodedig <a href="/wiki/Cymorth:Cyflwyniad" aria-label="Dysgu mwy am olygu"><span>dysgu mwy</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Arbennig:MyContributions" title="Rhestr golygiadau o'r cyfeiriad IP hwn [y]" accesskey="y"><span>Cyfraniadau</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Arbennig:MyTalk" title="Sgwrs ynglŷn â golygiadau o'r cyfeiriad IP hwn [n]" accesskey="n"><span>Sgwrs</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Safle"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Cynnwys" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Cynnwys</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">symud i'r bar ochr</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">cuddio</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Y dechrau</div> </a> </li> <li id="toc-Gwahanol_fathau" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Gwahanol_fathau"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Gwahanol fathau</span> </div> </a> <ul id="toc-Gwahanol_fathau-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Diagramau_Schlegel" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Diagramau_Schlegel"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Diagramau Schlegel</span> </div> </a> <ul id="toc-Diagramau_Schlegel-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Cyfaint" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Cyfaint"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Cyfaint</span> </div> </a> <ul id="toc-Cyfaint-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Arwynebedd_yr_arwynebau" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Arwynebedd_yr_arwynebau"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Arwynebedd yr arwynebau</span> </div> </a> <ul id="toc-Arwynebedd_yr_arwynebau-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Cyfeiriadau" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Cyfeiriadau"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Cyfeiriadau</span> </div> </a> <ul id="toc-Cyfeiriadau-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Cynnwys" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toglo'r tabl cynnwys" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toglo'r tabl cynnwys</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Prism (geometreg)</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Ewch i erthygl mewn iaith arall. Ar gael mewn 67 iaith" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-67" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">67 iaith</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%85%D9%86%D8%B4%D9%88%D8%B1_(%D9%87%D9%86%D8%AF%D8%B3%D8%A9)" title="منشور (هندسة) - Arabeg" lang="ar" hreflang="ar" data-title="منشور (هندسة)" data-language-autonym="العربية" data-language-local-name="Arabeg" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Prisma_(xeometr%C3%ADa)" title="Prisma (xeometría) - Astwrianeg" lang="ast" hreflang="ast" data-title="Prisma (xeometría)" data-language-autonym="Asturianu" data-language-local-name="Astwrianeg" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Prizma" title="Prizma - Aserbaijaneg" lang="az" hreflang="az" data-title="Prizma" data-language-autonym="Azərbaycanca" data-language-local-name="Aserbaijaneg" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-ba mw-list-item"><a href="https://ba.wikipedia.org/wiki/%D0%9F%D1%80%D0%B8%D0%B7%D0%BC%D0%B0_(%D0%B3%D0%B5%D0%BE%D0%BC%D0%B5%D1%82%D1%80%D0%B8%D1%8F)" title="Призма (геометрия) - Bashcorteg" lang="ba" hreflang="ba" data-title="Призма (геометрия)" data-language-autonym="Башҡортса" data-language-local-name="Bashcorteg" class="interlanguage-link-target"><span>Башҡортса</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%9F%D1%80%D1%8B%D0%B7%D0%BC%D0%B0_(%D0%B3%D0%B5%D0%B0%D0%BC%D0%B5%D1%82%D1%80%D1%8B%D1%8F)" title="Прызма (геаметрыя) - Belarwseg" lang="be" hreflang="be" data-title="Прызма (геаметрыя)" data-language-autonym="Беларуская" data-language-local-name="Belarwseg" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%9F%D1%80%D0%B8%D0%B7%D0%BC%D0%B0" title="Призма - Bwlgareg" lang="bg" hreflang="bg" data-title="Призма" data-language-autonym="Български" data-language-local-name="Bwlgareg" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%AA%E0%A7%8D%E0%A6%B0%E0%A6%BF%E0%A6%9C%E0%A6%AE_(%E0%A6%9C%E0%A7%8D%E0%A6%AF%E0%A6%BE%E0%A6%AE%E0%A6%BF%E0%A6%A4%E0%A6%BF)" title="প্রিজম (জ্যামিতি) - Bengaleg" lang="bn" hreflang="bn" data-title="প্রিজম (জ্যামিতি)" data-language-autonym="বাংলা" data-language-local-name="Bengaleg" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Prizma" title="Prizma - Bosnieg" lang="bs" hreflang="bs" data-title="Prizma" data-language-autonym="Bosanski" data-language-local-name="Bosnieg" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Prisma_(geometria)" title="Prisma (geometria) - Catalaneg" lang="ca" hreflang="ca" data-title="Prisma (geometria)" data-language-autonym="Català" data-language-local-name="Catalaneg" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D9%BE%D9%88%D8%A7%D8%B2%DA%A9_(%D8%A6%DB%95%D9%86%D8%AF%D8%A7%D8%B2%DB%95)" title="پوازک (ئەندازە) - Cwrdeg Sorani" lang="ckb" hreflang="ckb" data-title="پوازک (ئەندازە)" data-language-autonym="کوردی" data-language-local-name="Cwrdeg Sorani" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Hranol" title="Hranol - Tsieceg" lang="cs" hreflang="cs" data-title="Hranol" data-language-autonym="Čeština" data-language-local-name="Tsieceg" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%D0%9F%D1%80%D0%B8%D0%B7%D0%BC%D0%B0_(%D0%B3%D0%B5%D0%BE%D0%BC%D0%B5%D1%82%D1%80%D0%B8)" title="Призма (геометри) - Tshwfasheg" lang="cv" hreflang="cv" data-title="Призма (геометри)" data-language-autonym="Чӑвашла" data-language-local-name="Tshwfasheg" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Prisma_(Geometrie)" title="Prisma (Geometrie) - Almaeneg" lang="de" hreflang="de" data-title="Prisma (Geometrie)" data-language-autonym="Deutsch" data-language-local-name="Almaeneg" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%A0%CF%81%CE%AF%CF%83%CE%BC%CE%B1_(%CE%B3%CE%B5%CF%89%CE%BC%CE%B5%CF%84%CF%81%CE%AF%CE%B1)" title="Πρίσμα (γεωμετρία) - Groeg" lang="el" hreflang="el" data-title="Πρίσμα (γεωμετρία)" data-language-autonym="Ελληνικά" data-language-local-name="Groeg" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Prism_(geometry)" title="Prism (geometry) - Saesneg" lang="en" hreflang="en" data-title="Prism (geometry)" data-language-autonym="English" data-language-local-name="Saesneg" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Prismo" title="Prismo - Esperanto" lang="eo" hreflang="eo" data-title="Prismo" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Prisma_(geometr%C3%ADa)" title="Prisma (geometría) - Sbaeneg" lang="es" hreflang="es" data-title="Prisma (geometría)" data-language-autonym="Español" data-language-local-name="Sbaeneg" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Prisma" title="Prisma - Estoneg" lang="et" hreflang="et" data-title="Prisma" data-language-autonym="Eesti" data-language-local-name="Estoneg" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Prisma_(geometria)" title="Prisma (geometria) - Basgeg" lang="eu" hreflang="eu" data-title="Prisma (geometria)" data-language-autonym="Euskara" data-language-local-name="Basgeg" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%85%D9%86%D8%B4%D9%88%D8%B1_(%D9%87%D9%86%D8%AF%D8%B3%D9%87)" title="منشور (هندسه) - Perseg" lang="fa" hreflang="fa" data-title="منشور (هندسه)" data-language-autonym="فارسی" data-language-local-name="Perseg" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/S%C3%A4rmi%C3%B6" title="Särmiö - Ffinneg" lang="fi" hreflang="fi" data-title="Särmiö" data-language-autonym="Suomi" data-language-local-name="Ffinneg" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Prisme_(solide)" title="Prisme (solide) - Ffrangeg" lang="fr" hreflang="fr" data-title="Prisme (solide)" data-language-autonym="Français" data-language-local-name="Ffrangeg" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-frr mw-list-item"><a href="https://frr.wikipedia.org/wiki/Prisma_(Geometrii)" title="Prisma (Geometrii) - Ffriseg Gogleddol" lang="frr" hreflang="frr" data-title="Prisma (Geometrii)" data-language-autonym="Nordfriisk" data-language-local-name="Ffriseg Gogleddol" class="interlanguage-link-target"><span>Nordfriisk</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Priosma" title="Priosma - Gwyddeleg" lang="ga" hreflang="ga" data-title="Priosma" data-language-autonym="Gaeilge" data-language-local-name="Gwyddeleg" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Prisma_(xeometr%C3%ADa)" title="Prisma (xeometría) - Galisieg" lang="gl" hreflang="gl" data-title="Prisma (xeometría)" data-language-autonym="Galego" data-language-local-name="Galisieg" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%9E%D7%A0%D7%A1%D7%A8%D7%94_(%D7%92%D7%90%D7%95%D7%9E%D7%98%D7%A8%D7%99%D7%94)" title="מנסרה (גאומטריה) - Hebraeg" lang="he" hreflang="he" data-title="מנסרה (גאומטריה)" data-language-autonym="עברית" data-language-local-name="Hebraeg" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%AA%E0%A5%8D%E0%A4%B0%E0%A4%BF%E0%A4%9C%E0%A5%8D%E0%A4%AE_(%E0%A4%9C%E0%A5%8D%E0%A4%AF%E0%A4%BE%E0%A4%AE%E0%A4%BF%E0%A4%A4%E0%A4%BF)" title="प्रिज्म (ज्यामिति) - Hindi" lang="hi" hreflang="hi" data-title="प्रिज्म (ज्यामिति)" data-language-autonym="हिन्दी" data-language-local-name="Hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Prizma" title="Prizma - Croateg" lang="hr" hreflang="hr" data-title="Prizma" data-language-autonym="Hrvatski" data-language-local-name="Croateg" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Has%C3%A1b" title="Hasáb - Hwngareg" lang="hu" hreflang="hu" data-title="Hasáb" data-language-autonym="Magyar" data-language-local-name="Hwngareg" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%8A%D6%80%D5%AB%D5%A6%D5%B4%D5%A1" title="Պրիզմա - Armeneg" lang="hy" hreflang="hy" data-title="Պրիզմա" data-language-autonym="Հայերեն" data-language-local-name="Armeneg" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Prisma_(geometri)" title="Prisma (geometri) - Indoneseg" lang="id" hreflang="id" data-title="Prisma (geometri)" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indoneseg" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Prisma" title="Prisma - Eidaleg" lang="it" hreflang="it" data-title="Prisma" data-language-autonym="Italiano" data-language-local-name="Eidaleg" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E8%A7%92%E6%9F%B1" title="角柱 - Japaneeg" lang="ja" hreflang="ja" data-title="角柱" data-language-autonym="日本語" data-language-local-name="Japaneeg" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-jv mw-list-item"><a href="https://jv.wikipedia.org/wiki/Prisma_(g%C3%A9om%C3%A8tri)" title="Prisma (géomètri) - Jafanaeg" lang="jv" hreflang="jv" data-title="Prisma (géomètri)" data-language-autonym="Jawa" data-language-local-name="Jafanaeg" class="interlanguage-link-target"><span>Jawa</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%9E%E1%83%A0%E1%83%98%E1%83%96%E1%83%9B%E1%83%90" title="პრიზმა - Georgeg" lang="ka" hreflang="ka" data-title="პრიზმა" data-language-autonym="ქართული" data-language-local-name="Georgeg" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%9F%D1%80%D0%B8%D0%B7%D0%BC%D0%B0" title="Призма - Casacheg" lang="kk" hreflang="kk" data-title="Призма" data-language-autonym="Қазақша" data-language-local-name="Casacheg" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EA%B0%81%EA%B8%B0%EB%91%A5" title="각기둥 - Coreeg" lang="ko" hreflang="ko" data-title="각기둥" data-language-autonym="한국어" data-language-local-name="Coreeg" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Prizma" title="Prizma - Latfieg" lang="lv" hreflang="lv" data-title="Prizma" data-language-autonym="Latviešu" data-language-local-name="Latfieg" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mdf mw-list-item"><a href="https://mdf.wikipedia.org/wiki/%D0%9F%D1%80%D0%B8%D0%B7%D0%BC%D0%B0%D1%81%D1%8C_(%D0%B3%D0%B5%D0%BE%D0%BC%D0%B5%D1%82%D1%80%D0%B8%D1%8F%D1%81%D1%8C)" title="Призмась (геометриясь) - Mocsia" lang="mdf" hreflang="mdf" data-title="Призмась (геометриясь)" data-language-autonym="Мокшень" data-language-local-name="Mocsia" class="interlanguage-link-target"><span>Мокшень</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%9F%D1%80%D0%B8%D0%B7%D0%BC%D0%B0_(%D0%B3%D0%B5%D0%BE%D0%BC%D0%B5%D1%82%D1%80%D0%B8%D1%98%D0%B0)" title="Призма (геометрија) - Macedoneg" lang="mk" hreflang="mk" data-title="Призма (геометрија)" data-language-autonym="Македонски" data-language-local-name="Macedoneg" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Prisma_(wiskunde)" title="Prisma (wiskunde) - Iseldireg" lang="nl" hreflang="nl" data-title="Prisma (wiskunde)" data-language-autonym="Nederlands" data-language-local-name="Iseldireg" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Prisme_i_geometri" title="Prisme i geometri - Norwyeg Nynorsk" lang="nn" hreflang="nn" data-title="Prisme i geometri" data-language-autonym="Norsk nynorsk" data-language-local-name="Norwyeg Nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Prisme_(geometri)" title="Prisme (geometri) - Norwyeg Bokmål" lang="nb" hreflang="nb" data-title="Prisme (geometri)" data-language-autonym="Norsk bokmål" data-language-local-name="Norwyeg Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Graniastos%C5%82up" title="Graniastosłup - Pwyleg" lang="pl" hreflang="pl" data-title="Graniastosłup" data-language-autonym="Polski" data-language-local-name="Pwyleg" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Prisma" title="Prisma - Portiwgaleg" lang="pt" hreflang="pt" data-title="Prisma" data-language-autonym="Português" data-language-local-name="Portiwgaleg" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Prism%C4%83_(geometrie)" title="Prismă (geometrie) - Rwmaneg" lang="ro" hreflang="ro" data-title="Prismă (geometrie)" data-language-autonym="Română" data-language-local-name="Rwmaneg" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9F%D1%80%D0%B8%D0%B7%D0%BC%D0%B0_(%D0%B3%D0%B5%D0%BE%D0%BC%D0%B5%D1%82%D1%80%D0%B8%D1%8F)" title="Призма (геометрия) - Rwseg" lang="ru" hreflang="ru" data-title="Призма (геометрия)" data-language-autonym="Русский" data-language-local-name="Rwseg" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Prizma_(geometrija)" title="Prizma (geometrija) - Serbo-Croateg" lang="sh" hreflang="sh" data-title="Prizma (geometrija)" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="Serbo-Croateg" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Prism_(geometry)" title="Prism (geometry) - Simple English" lang="en-simple" hreflang="en-simple" data-title="Prism (geometry)" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Hranol_(mnohosten)" title="Hranol (mnohosten) - Slofaceg" lang="sk" hreflang="sk" data-title="Hranol (mnohosten)" data-language-autonym="Slovenčina" data-language-local-name="Slofaceg" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Prizma" title="Prizma - Slofeneg" lang="sl" hreflang="sl" data-title="Prizma" data-language-autonym="Slovenščina" data-language-local-name="Slofeneg" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sn badge-Q70893996 mw-list-item" title=""><a href="https://sn.wikipedia.org/wiki/Zhumwi" title="Zhumwi - Shona" lang="sn" hreflang="sn" data-title="Zhumwi" data-language-autonym="ChiShona" data-language-local-name="Shona" class="interlanguage-link-target"><span>ChiShona</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Prizmi_(gjeometri)" title="Prizmi (gjeometri) - Albaneg" lang="sq" hreflang="sq" data-title="Prizmi (gjeometri)" data-language-autonym="Shqip" data-language-local-name="Albaneg" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%9F%D1%80%D0%B8%D0%B7%D0%BC%D0%B0_(%D0%B3%D0%B5%D0%BE%D0%BC%D0%B5%D1%82%D1%80%D0%B8%D1%98%D1%81%D0%BA%D0%B0_%D1%84%D0%B8%D0%B3%D1%83%D1%80%D0%B0)" title="Призма (геометријска фигура) - Serbeg" lang="sr" hreflang="sr" data-title="Призма (геометријска фигура)" data-language-autonym="Српски / srpski" data-language-local-name="Serbeg" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-su mw-list-item"><a href="https://su.wikipedia.org/wiki/Prisma_(g%C3%A9om%C3%A9tri)" title="Prisma (géométri) - Swndaneg" lang="su" hreflang="su" data-title="Prisma (géométri)" data-language-autonym="Sunda" data-language-local-name="Swndaneg" class="interlanguage-link-target"><span>Sunda</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Prisma_(geometri)" title="Prisma (geometri) - Swedeg" lang="sv" hreflang="sv" data-title="Prisma (geometri)" data-language-autonym="Svenska" data-language-local-name="Swedeg" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%AA%E0%AE%9F%E0%AF%8D%E0%AE%9F%E0%AE%95%E0%AE%AE%E0%AF%8D_(%E0%AE%B5%E0%AE%9F%E0%AE%BF%E0%AE%B5%E0%AE%B5%E0%AE%BF%E0%AE%AF%E0%AE%B2%E0%AF%8D)" title="பட்டகம் (வடிவவியல்) - Tamileg" lang="ta" hreflang="ta" data-title="பட்டகம் (வடிவவியல்)" data-language-autonym="தமிழ்" data-language-local-name="Tamileg" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%AA%E0%B0%9F%E0%B1%8D%E0%B0%9F%E0%B0%95%E0%B0%82_(%E0%B0%B0%E0%B1%87%E0%B0%96%E0%B0%BE%E0%B0%97%E0%B0%A3%E0%B0%BF%E0%B0%A4%E0%B0%82)" title="పట్టకం (రేఖాగణితం) - Telugu" lang="te" hreflang="te" data-title="పట్టకం (రేఖాగణితం)" data-language-autonym="తెలుగు" data-language-local-name="Telugu" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-tg mw-list-item"><a href="https://tg.wikipedia.org/wiki/%D0%9F%D1%80%D0%B8%D0%B7%D0%BC%D0%B0_(%D0%B3%D0%B5%D0%BE%D0%BC%D0%B5%D1%82%D1%80%D0%B8%D1%8F)" title="Призма (геометрия) - Tajiceg" lang="tg" hreflang="tg" data-title="Призма (геометрия)" data-language-autonym="Тоҷикӣ" data-language-local-name="Tajiceg" class="interlanguage-link-target"><span>Тоҷикӣ</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%9B%E0%B8%A3%E0%B8%B4%E0%B8%8B%E0%B8%B6%E0%B8%A1" title="ปริซึม - Thai" lang="th" hreflang="th" data-title="ปริซึม" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Prizma_(geometri)" title="Prizma (geometri) - Tyrceg" lang="tr" hreflang="tr" data-title="Prizma (geometri)" data-language-autonym="Türkçe" data-language-local-name="Tyrceg" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%9F%D1%80%D0%B8%D0%B7%D0%BC%D0%B0_(%D0%BC%D0%B0%D1%82%D0%B5%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B0)" title="Призма (математика) - Wcreineg" lang="uk" hreflang="uk" data-title="Призма (математика)" data-language-autonym="Українська" data-language-local-name="Wcreineg" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Prizma" title="Prizma - Wsbeceg" lang="uz" hreflang="uz" data-title="Prizma" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="Wsbeceg" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/H%C3%ACnh_l%C4%83ng_tr%E1%BB%A5" title="Hình lăng trụ - Fietnameg" lang="vi" hreflang="vi" data-title="Hình lăng trụ" data-language-autonym="Tiếng Việt" data-language-local-name="Fietnameg" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E6%A3%B1%E6%9F%B1" title="棱柱 - Wu Tsieineaidd" lang="wuu" hreflang="wuu" data-title="棱柱" data-language-autonym="吴语" data-language-local-name="Wu Tsieineaidd" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E6%A3%B1%E6%9F%B1" title="棱柱 - Tsieinëeg" lang="zh" hreflang="zh" data-title="棱柱" data-language-autonym="中文" data-language-local-name="Tsieinëeg" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E6%A3%B1%E6%9F%B1" title="棱柱 - Cantoneeg" lang="yue" hreflang="yue" data-title="棱柱" data-language-autonym="粵語" data-language-local-name="Cantoneeg" class="interlanguage-link-target"><span>粵語</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q180544#sitelinks-wikipedia" title="Golygu dolenni rhyngwici" class="wbc-editpage">Golygu dolenni</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Parthau"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Prism_(geometreg)" title="Gweld y dudalen bwnc [c]" accesskey="c"><span>Erthygl</span></a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Sgwrs:Prism_(geometreg)&action=edit&redlink=1" rel="discussion" class="new" title="Sgwrsio am y dudalen (dim tudalen ar gael) [t]" accesskey="t"><span>Sgwrs</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Newid amrywiad iaith" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Cymraeg</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Golygon"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Prism_(geometreg)"><span>Darllen</span></a></li><li id="ca-ve-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Prism_(geometreg)&veaction=edit" title="Golygu'r dudalen hon [v]" accesskey="v"><span>Golygu</span></a></li><li id="ca-edit" class="collapsible vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Prism_(geometreg)&action=edit" title="Golygu cod ffynhonnell y dudalen hon [e]" accesskey="e"><span>Golygu cod</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Prism_(geometreg)&action=history" title="Fersiynau cynt o'r dudalen hon. [h]" accesskey="h"><span>Gweld hanes</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Offer tudalen"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Blwch offer" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Blwch offer</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Blwch offer</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">symud i'r bar ochr</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">cuddio</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Rhagor o opsiynau" > <div class="vector-menu-heading"> Gweithredoedd </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Prism_(geometreg)"><span>Darllen</span></a></li><li id="ca-more-ve-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Prism_(geometreg)&veaction=edit" title="Golygu'r dudalen hon [v]" accesskey="v"><span>Golygu</span></a></li><li id="ca-more-edit" class="collapsible vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Prism_(geometreg)&action=edit" title="Golygu cod ffynhonnell y dudalen hon [e]" accesskey="e"><span>Golygu cod</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Prism_(geometreg)&action=history"><span>Gweld hanes</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> Cyffredinol </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Arbennig:WhatLinksHere/Prism_(geometreg)" title="Rhestr o bob tudalen sy'n cysylltu â hon [j]" accesskey="j"><span>Beth sy'n cysylltu yma</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Arbennig:RecentChangesLinked/Prism_(geometreg)" rel="nofollow" title="Newidiadau diweddar i dudalennau sydd yn cysylltu â hon [k]" accesskey="k"><span>Newidiadau perthnasol</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Arbennig:SpecialPages" title="Rhestr o'r holl dudalennau arbennig [q]" accesskey="q"><span>Tudalennau arbennig</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Prism_(geometreg)&oldid=11024159" title="Dolen barhaol i'r fersiwn hwn y dudalen hon"><span>Dolen barhaol</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Prism_(geometreg)&action=info" title="Mwy o wybodaeth am y dudalen hon"><span>Gwybodaeth am y dudalen</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Arbennig:CiteThisPage&page=Prism_%28geometreg%29&id=11024159&wpFormIdentifier=titleform" title="Gwybodaeth ar sut i gyfeirio at y dudalen hon"><span>Cyfeirio at y dudalen hon</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Arbennig:UrlShortener&url=https%3A%2F%2Fcy.wikipedia.org%2Fwiki%2FPrism_%28geometreg%29"><span>Cael URL byr</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Arbennig:QrCode&url=https%3A%2F%2Fcy.wikipedia.org%2Fwiki%2FPrism_%28geometreg%29"><span>Lawrlwytho cod QR</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Argraffu / allforio </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=Arbennig:Book&bookcmd=book_creator&referer=Prism+%28geometreg%29"><span>Llunio llyfr</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Arbennig:DownloadAsPdf&page=Prism_%28geometreg%29&action=show-download-screen"><span>Lawrlwytho fel PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Prism_(geometreg)&printable=yes" title="Cynhyrchwch fersiwn o'r dudalen yn barod at ei hargraffu [p]" accesskey="p"><span>Fersiwn argraffu</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> Mewn prosiectau eraill </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Category:Prisms_(geometry)" hreflang="en"><span>Comin Wikimedia</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q180544" title="Cysylltu i eitem ystorfa gysylltiedig [g]" accesskey="g"><span>Eitem Wicidata</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Offer tudalen"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Gwedd"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Gwedd</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">symud i'r bar ochr</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">cuddio</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Oddi ar Wicipedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"><span class="mw-redirectedfrom">(Ailgyfeiriad o <a href="/w/index.php?title=Prism&redirect=no" class="mw-redirect" title="Prism">Prism</a>)</span></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="cy" dir="ltr"><figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Delwedd:Hexagonal_Prism_BC.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/31/Hexagonal_Prism_BC.svg/220px-Hexagonal_Prism_BC.svg.png" decoding="async" width="220" height="180" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/31/Hexagonal_Prism_BC.svg/330px-Hexagonal_Prism_BC.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/31/Hexagonal_Prism_BC.svg/440px-Hexagonal_Prism_BC.svg.png 2x" data-file-width="385" data-file-height="315" /></a><figcaption>Prism hecsagonal</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Delwedd:TruncatedTriangularPrism.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8c/TruncatedTriangularPrism.png/220px-TruncatedTriangularPrism.png" decoding="async" width="220" height="249" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8c/TruncatedTriangularPrism.png/330px-TruncatedTriangularPrism.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8c/TruncatedTriangularPrism.png/440px-TruncatedTriangularPrism.png 2x" data-file-width="1203" data-file-height="1359" /></a><figcaption>Prism triongl blaendor gyda'i arwyneb uchaf wedi ei flaendori ar ongl arosgo.</figcaption></figure> <p>Mewn <a href="/wiki/Geometreg" title="Geometreg">geometreg</a>, mae <b>prism</b> yn <a href="/wiki/Polyhedron" title="Polyhedron">bolyhedron</a> sy'n cynnwys sylfaen polygonal gydag ochrau amrywiol (o ran nifer). Fe'i enwir ar ôl siâp gwaelodol y prism, sef y sylfaen e.e. gelwir prism sydd a'i sylfaen yn siâp <a href="/wiki/Triongl" title="Triongl">triongl</a> yn "brism triongl" neu'n "brism trionglog". Mae'r prism yn isddosbarth o'r 'prismatoidau'.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Gwahanol_fathau">Gwahanol fathau</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Prism_(geometreg)&veaction=edit&section=1" title="Golygu'r adran: Gwahanol fathau" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Prism_(geometreg)&action=edit&section=1" title="Edit section's source code: Gwahanol fathau"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><b>Prism union</b> (<i>right prism</i>) yw prism lle mae'r ymylon a'r arwynebau yn berpendicwlar i arwynebau'r gwaelodion (neu'r 'sylfaen'); mae'r gair "union" yma'n cyfeirio at ongl sgwâr. Mae hyn yn berthnasol os yw'r arwynebau cyswllt yn <a href="/wiki/Petryal" title="Petryal">betryal</a>. Os nad yw'r ymylon a'r wynebau ymuno yn berpendicwlar i'r wynebau sylfaenol, gelwir hyn yn <b>brism arosgo</b>.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> Er enghraifft, mae paralelepiped yn brism arosgo gyda'r sylfaen yn <a href="/wiki/Paralelogram" title="Paralelogram">baralelogram</a>, ac yn bolyhedron gyda chwech ochr a phob un yn baralelogram. </p><p>Mae'r <b>prism blaendor</b> yn brism gyda'i arwynebau (top a gwaelod) heb fod yn gyfochrog i'w gilydd.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p><p>Weithiau, defnyddir y term "prism petryalog" i'r prism petryalog union a "phrism sgwarog" i'r "prism sgwarog union". Mae gan y 'prism p-gonal union', gydag ochrau petryalog, symbol Schläfli { } × {p}. </p><p>Gelwir y prism petryalog hefyd yn <a href="/wiki/Ciwboid" title="Ciwboid">giwboid</a>, neu'n anffurfiol yn "flwch petryalog". "Blwch sgwâr" neu "ciwboid sgwarog" yw'r enw arall ar y prism union sgwarog. Mae gan y brism union petryalog symbol Schläfli { }×{ }×{ }. </p> <div class="mw-heading mw-heading2"><h2 id="Diagramau_Schlegel">Diagramau Schlegel</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Prism_(geometreg)&veaction=edit&section=2" title="Golygu'r adran: Diagramau Schlegel" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Prism_(geometreg)&action=edit&section=2" title="Edit section's source code: Diagramau Schlegel"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <table class="wikitable"> <tbody><tr align="center"> <td><span typeof="mw:File"><a href="/wiki/Delwedd:Triangular_prismatic_graph.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/de/Triangular_prismatic_graph.png/100px-Triangular_prismatic_graph.png" decoding="async" width="100" height="78" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/de/Triangular_prismatic_graph.png/150px-Triangular_prismatic_graph.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/de/Triangular_prismatic_graph.png/200px-Triangular_prismatic_graph.png 2x" data-file-width="588" data-file-height="461" /></a></span><br />P3 </td> <td><span typeof="mw:File"><a href="/wiki/Delwedd:Cubical_graph.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/3a/Cubical_graph.png/100px-Cubical_graph.png" decoding="async" width="100" height="88" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/3a/Cubical_graph.png/150px-Cubical_graph.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/3a/Cubical_graph.png/200px-Cubical_graph.png 2x" data-file-width="474" data-file-height="417" /></a></span><br />P4 </td> <td><span typeof="mw:File"><a href="/wiki/Delwedd:Pentagonal_prismatic_graph.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Pentagonal_prismatic_graph.png/100px-Pentagonal_prismatic_graph.png" decoding="async" width="100" height="95" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Pentagonal_prismatic_graph.png/150px-Pentagonal_prismatic_graph.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Pentagonal_prismatic_graph.png/200px-Pentagonal_prismatic_graph.png 2x" data-file-width="517" data-file-height="493" /></a></span><br />P5 </td> <td><span typeof="mw:File"><a href="/wiki/Delwedd:Hexagonal_prismatic_graph.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/9/9b/Hexagonal_prismatic_graph.png/100px-Hexagonal_prismatic_graph.png" decoding="async" width="100" height="90" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/9b/Hexagonal_prismatic_graph.png/150px-Hexagonal_prismatic_graph.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/9b/Hexagonal_prismatic_graph.png/200px-Hexagonal_prismatic_graph.png 2x" data-file-width="480" data-file-height="434" /></a></span><br />P6 </td> <td><span typeof="mw:File"><a href="/wiki/Delwedd:Heptagonal_prismatic_graph.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Heptagonal_prismatic_graph.png/100px-Heptagonal_prismatic_graph.png" decoding="async" width="100" height="98" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Heptagonal_prismatic_graph.png/150px-Heptagonal_prismatic_graph.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Heptagonal_prismatic_graph.png/200px-Heptagonal_prismatic_graph.png 2x" data-file-width="437" data-file-height="430" /></a></span><br />P7 </td> <td><span typeof="mw:File"><a href="/wiki/Delwedd:Octagonal_prismatic_graph.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d8/Octagonal_prismatic_graph.png/100px-Octagonal_prismatic_graph.png" decoding="async" width="100" height="101" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d8/Octagonal_prismatic_graph.png/150px-Octagonal_prismatic_graph.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d8/Octagonal_prismatic_graph.png/200px-Octagonal_prismatic_graph.png 2x" data-file-width="419" data-file-height="422" /></a></span><br />P8 </td></tr></tbody></table> <div class="mw-heading mw-heading2"><h2 id="Cyfaint">Cyfaint</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Prism_(geometreg)&veaction=edit&section=3" title="Golygu'r adran: Cyfaint" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Prism_(geometreg)&action=edit&section=3" title="Edit section's source code: Cyfaint"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Cyfaint prism yw cyfanswm <a href="/wiki/Arwynebedd" title="Arwynebedd">arwynebedd</a> y sylfaen a'r pellter rhwng y ddau arwyneb sylfaenol, neu'r uchder. Yn achos prism nad yw'n union (nad yw'n ongl sgwâr), mae hyn yn golygu'r pellter perpendicwlar). </p><p>Y cyfaint, felly, yw: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle V=Bh}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>V</mi> <mo>=</mo> <mi>B</mi> <mi>h</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle V=Bh}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/c3e15c6d53c110a03b62daee85cbaaec7b1ab338" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:7.989ex; height:2.176ex;" alt="{\displaystyle V=Bh}"></span></dd></dl> <p>ble nodir <i>B</i> i olygu arwynebedd y sylfaen (<i>base</i>) a <i>h</i> yw'r uchder. Mae cyfaint prism sydd a sylfaen rheolaidd <i>n</i>-ochrog, gyda hyd yr ochrau yn <i>s</i>, felly, yw: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle V={\frac {n}{4}}hs^{2}\cot({\frac {\pi }{n}})}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>V</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mi>n</mi> <mn>4</mn> </mfrac> </mrow> <mi>h</mi> <msup> <mi>s</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> <mi>cot</mi> <mo>⁡</mo> <mo stretchy="false">(</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mi>π</mi> <mi>n</mi> </mfrac> </mrow> <mo stretchy="false">)</mo> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle V={\frac {n}{4}}hs^{2}\cot({\frac {\pi }{n}})}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/cc15235806edee9f9709ecc78ba465f2d7944dad" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.838ex; width:18.127ex; height:4.676ex;" alt="{\displaystyle V={\frac {n}{4}}hs^{2}\cot({\frac {\pi }{n}})}"></span></dd></dl> <div class="mw-heading mw-heading2"><h2 id="Arwynebedd_yr_arwynebau">Arwynebedd yr arwynebau</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Prism_(geometreg)&veaction=edit&section=4" title="Golygu'r adran: Arwynebedd yr arwynebau" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Prism_(geometreg)&action=edit&section=4" title="Edit section's source code: Arwynebedd yr arwynebau"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Mae arwynebedd arwynebau prism fel a ganlyn: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle 2B+Ph}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mn>2</mn> <mi>B</mi> <mo>+</mo> <mi>P</mi> <mi>h</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle 2B+Ph}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/881aa43d6a2ffa10f58717ca57ba2c8125f0d1c9" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.505ex; width:8.851ex; height:2.343ex;" alt="{\displaystyle 2B+Ph}"></span></dd></dl> <p>ble, <i>B</i> yw arwynebedd y sylfaen, <i>h</i> yw'r uchder, a <i>P</i> yw <a href="/wiki/Perimedr" title="Perimedr">perimedr</a> y sylfaen. </p><p>Mae arwynebedd arwynebau prism union sydd a'i sylfaen yn bolygon rheolaidd <i>n</i>-ochrog, gyda hyd ei ochrau yn <i>s</i> a'i uchder yn <i>h</i>, felly, yn: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle A={\frac {n}{2}}s^{2}\cot {\frac {\pi }{n}}+nsh}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>A</mi> <mo>=</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mi>n</mi> <mn>2</mn> </mfrac> </mrow> <msup> <mi>s</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> <mi>cot</mi> <mo>⁡</mo> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mi>π</mi> <mi>n</mi> </mfrac> </mrow> <mo>+</mo> <mi>n</mi> <mi>s</mi> <mi>h</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle A={\frac {n}{2}}s^{2}\cot {\frac {\pi }{n}}+nsh}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/ca1bb508bb2ae6b92ea8096ab6cf5039e09f415f" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.838ex; width:21.986ex; height:4.676ex;" alt="{\displaystyle A={\frac {n}{2}}s^{2}\cot {\frac {\pi }{n}}+nsh}"></span></dd></dl> <div class="mw-heading mw-heading2"><h2 id="Cyfeiriadau">Cyfeiriadau</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Prism_(geometreg)&veaction=edit&section=5" title="Golygu'r adran: Cyfeiriadau" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Prism_(geometreg)&action=edit&section=5" title="Edit section's source code: Cyfeiriadau"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="reflist" style="list-style-type: decimal;"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://termau.cymru/#prismatoid">termau.cymru;</a> <i>Porth Termau Cenedlaethol Cymru</i>; adalwyd 22 Medi 2018.</span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">↑</a></span> <span class="reference-text">William F. Kern, James R Bland,<i>Solid Mensuration with proofs</i>, 1938, tud.28</span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><a href="#cite_ref-3">↑</a></span> <span class="reference-text">William F. Kern, James R Bland,<i>Solid Mensuration with proofs</i>, 1938, tud.81</span> </li> </ol></div></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Wedi dod o "<a dir="ltr" href="https://cy.wikipedia.org/w/index.php?title=Prism_(geometreg)&oldid=11024159">https://cy.wikipedia.org/w/index.php?title=Prism_(geometreg)&oldid=11024159</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Arbennig:Categories" title="Arbennig:Categories">Categorïau</a>: <ul><li><a href="/wiki/Categori:Polyhedra" title="Categori:Polyhedra">Polyhedra</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> Golygwyd y dudalen hon ddiwethaf ar 15 Ionawr 2022, am 09:56.</li> <li id="footer-info-copyright">Mae'r testun ar gael o dan <a rel="nofollow" class="external text" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en">Creative Commons Attribution-ShareAlike License</a>; gall telerau ychwanegol fod yn berthnasol. 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