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Available in 44 languages" > <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-44" 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">44 languages</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%D8%AD%D9%8A%D8%B7_%D9%85%D9%86%D8%AD%D9%86%D9%89_%D9%85%D8%BA%D9%84%D9%82" title="محيط منحنى مغلق – Arabica" lang="ar" hreflang="ar" data-title="محيط منحنى مغلق" data-language-autonym="العربية" data-language-local-name="Arabica" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-as mw-list-item"><a href="https://as.wikipedia.org/wiki/%E0%A6%AA%E0%A7%B0%E0%A6%BF%E0%A6%A7%E0%A6%BF" title="পৰিধি – Assamica" lang="as" hreflang="as" data-title="পৰিধি" data-language-autonym="অসমীয়া" data-language-local-name="Assamica" class="interlanguage-link-target"><span>অসমীয়া</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%9E%D0%B1%D0%B8%D0%BA%D0%BE%D0%BB%D0%BA%D0%B0" title="Обиколка – Bulgarica" lang="bg" hreflang="bg" data-title="Обиколка" data-language-autonym="Български" data-language-local-name="Bulgarica" 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%A6%B0%E0%A6%BF%E0%A6%A7%E0%A6%BF" title="পরিধি – Bengalica" lang="bn" hreflang="bn" data-title="পরিধি" data-language-autonym="বাংলা" data-language-local-name="Bengalica" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Cylchedd" title="Cylchedd – Cambrica" lang="cy" hreflang="cy" data-title="Cylchedd" data-language-autonym="Cymraeg" data-language-local-name="Cambrica" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-de badge-Q70894304 mw-list-item" title=""><a href="https://de.wikipedia.org/wiki/Kreisumfang" title="Kreisumfang – Germanica" lang="de" hreflang="de" data-title="Kreisumfang" data-language-autonym="Deutsch" data-language-local-name="Germanica" 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%CE%B5%CF%81%CE%B9%CF%86%CE%AD%CF%81%CE%B5%CE%B9%CE%B1_(%CE%B3%CE%B5%CF%89%CE%BC%CE%B5%CF%84%CF%81%CE%AF%CE%B1)" title="Περιφέρεια (γεωμετρία) – Graeca" lang="el" hreflang="el" data-title="Περιφέρεια (γεωμετρία)" data-language-autonym="Ελληνικά" data-language-local-name="Graeca" 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/Circumference" title="Circumference – Anglica" lang="en" hreflang="en" data-title="Circumference" data-language-autonym="English" data-language-local-name="Anglica" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Circunferencia" title="Circunferencia – Hispanica" lang="es" hreflang="es" data-title="Circunferencia" data-language-autonym="Español" data-language-local-name="Hispanica" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Zirkunferentzia" title="Zirkunferentzia – Vasconica" lang="eu" hreflang="eu" data-title="Zirkunferentzia" data-language-autonym="Euskara" data-language-local-name="Vasconica" 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%D8%AD%DB%8C%D8%B7_%D9%85%D9%86%D8%AD%D9%86%DB%8C" title="محیط منحنی – Persica" lang="fa" hreflang="fa" data-title="محیط منحنی" data-language-autonym="فارسی" data-language-local-name="Persica" 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/Keh%C3%A4_(geometria)" title="Kehä (geometria) – Finnica" lang="fi" hreflang="fi" data-title="Kehä (geometria)" data-language-autonym="Suomi" data-language-local-name="Finnica" 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/Circonf%C3%A9rence" title="Circonférence – Francogallica" lang="fr" hreflang="fr" data-title="Circonférence" data-language-autonym="Français" data-language-local-name="Francogallica" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Iml%C3%ADne" title="Imlíne – Hibernica" lang="ga" hreflang="ga" data-title="Imlíne" data-language-autonym="Gaeilge" data-language-local-name="Hibernica" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gu mw-list-item"><a href="https://gu.wikipedia.org/wiki/%E0%AA%B5%E0%AA%B0%E0%AB%8D%E0%AA%A4%E0%AB%81%E0%AA%B3%E0%AA%A8%E0%AB%8B_%E0%AA%AA%E0%AA%B0%E0%AA%BF%E0%AA%98" title="વર્તુળનો પરિઘ – Gujaratensis" lang="gu" hreflang="gu" data-title="વર્તુળનો પરિઘ" data-language-autonym="ગુજરાતી" data-language-local-name="Gujaratensis" class="interlanguage-link-target"><span>ગુજરાતી</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%AA%E0%A4%B0%E0%A4%BF%E0%A4%A7%E0%A4%BF" title="परिधि – Hindica" lang="hi" hreflang="hi" data-title="परिधि" data-language-autonym="हिन्दी" data-language-local-name="Hindica" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%87%D6%80%D5%BB%D5%A1%D5%B6%D5%A1%D5%A3%D5%AE%D5%AB_%D5%A5%D6%80%D5%AF%D5%A1%D6%80%D5%B8%D6%82%D5%A9%D5%B5%D5%B8%D6%82%D5%B6" title="Շրջանագծի երկարություն – Armenica" lang="hy" hreflang="hy" data-title="Շրջանագծի երկարություն" data-language-autonym="Հայերեն" data-language-local-name="Armenica" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-ia mw-list-item"><a href="https://ia.wikipedia.org/wiki/Circumferentia" title="Circumferentia – Interlingua" lang="ia" hreflang="ia" data-title="Circumferentia" data-language-autonym="Interlingua" data-language-local-name="Interlingua" class="interlanguage-link-target"><span>Interlingua</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Keliling_lingkaran" title="Keliling lingkaran – Indonesian" lang="id" hreflang="id" data-title="Keliling lingkaran" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/Umm%C3%A1l" title="Ummál – Islandica" lang="is" hreflang="is" data-title="Ummál" data-language-autonym="Íslenska" data-language-local-name="Islandica" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E5%86%86%E5%91%A8" title="円周 – Iaponica" lang="ja" hreflang="ja" data-title="円周" data-language-autonym="日本語" data-language-local-name="Iaponica" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-kab mw-list-item"><a href="https://kab.wikipedia.org/wiki/Tase%C9%A3leyt" title="Taseɣleyt – Kabyle" lang="kab" hreflang="kab" data-title="Taseɣleyt" data-language-autonym="Taqbaylit" data-language-local-name="Kabyle" class="interlanguage-link-target"><span>Taqbaylit</span></a></li><li class="interlanguage-link interwiki-kn mw-list-item"><a href="https://kn.wikipedia.org/wiki/%E0%B2%AA%E0%B2%B0%E0%B2%BF%E0%B2%A7%E0%B2%BF" title="ಪರಿಧಿ – Cannadica" lang="kn" hreflang="kn" data-title="ಪರಿಧಿ" data-language-autonym="ಕನ್ನಡ" data-language-local-name="Cannadica" class="interlanguage-link-target"><span>ಕನ್ನಡ</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%9B%90%EB%91%98%EB%A0%88" title="원둘레 – Coreana" lang="ko" hreflang="ko" data-title="원둘레" data-language-autonym="한국어" data-language-local-name="Coreana" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-lg mw-list-item"><a href="https://lg.wikipedia.org/wiki/Obwetoloovu_(Circumference)" title="Obwetoloovu (Circumference) – Ganda" lang="lg" hreflang="lg" data-title="Obwetoloovu (Circumference)" data-language-autonym="Luganda" data-language-local-name="Ganda" class="interlanguage-link-target"><span>Luganda</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Apskritimo_ilgis" title="Apskritimo ilgis – Lithuanica" lang="lt" hreflang="lt" data-title="Apskritimo ilgis" data-language-autonym="Lietuvių" data-language-local-name="Lithuanica" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%9E%D0%B1%D0%B8%D0%BA%D0%BE%D0%BB%D0%BA%D0%B0_(%D0%B3%D0%B5%D0%BE%D0%BC%D0%B5%D1%82%D1%80%D0%B8%D1%98%D0%B0)" title="Обиколка (геометрија) – Macedonica" lang="mk" hreflang="mk" data-title="Обиколка (геометрија)" data-language-autonym="Македонски" data-language-local-name="Macedonica" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A4%AA%E0%A4%B0%E0%A5%80%E0%A4%98" title="परीघ – Marathica" lang="mr" hreflang="mr" data-title="परीघ" data-language-autonym="मराठी" data-language-local-name="Marathica" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Circonfer%C3%A9ncia" title="Circonferéncia – Occitana" lang="oc" hreflang="oc" data-title="Circonferéncia" data-language-autonym="Occitan" data-language-local-name="Occitana" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-pms mw-list-item"><a href="https://pms.wikipedia.org/wiki/Sirconferensa" title="Sirconferensa – Piedmontese" lang="pms" hreflang="pms" data-title="Sirconferensa" data-language-autonym="Piemontèis" data-language-local-name="Piedmontese" class="interlanguage-link-target"><span>Piemontèis</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Comprimento_da_circunfer%C3%AAncia" title="Comprimento da circunferência – Lusitana" lang="pt" hreflang="pt" data-title="Comprimento da circunferência" data-language-autonym="Português" data-language-local-name="Lusitana" 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/Circumferin%C8%9B%C4%83" title="Circumferință – Dacoromanica" lang="ro" hreflang="ro" data-title="Circumferință" data-language-autonym="Română" data-language-local-name="Dacoromanica" 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%94%D0%BB%D0%B8%D0%BD%D0%B0_%D0%BE%D0%BA%D1%80%D1%83%D0%B6%D0%BD%D0%BE%D1%81%D1%82%D0%B8" title="Длина окружности – Russica" lang="ru" hreflang="ru" data-title="Длина окружности" data-language-autonym="Русский" data-language-local-name="Russica" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-scn mw-list-item"><a href="https://scn.wikipedia.org/wiki/Circunfirenza" title="Circunfirenza – Sicilian" lang="scn" hreflang="scn" data-title="Circunfirenza" data-language-autonym="Sicilianu" data-language-local-name="Sicilian" class="interlanguage-link-target"><span>Sicilianu</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Circumference" title="Circumference – Simple English" lang="en-simple" hreflang="en-simple" data-title="Circumference" 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-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Mzingo_(jiometria)" title="Mzingo (jiometria) – Suahili" lang="sw" hreflang="sw" data-title="Mzingo (jiometria)" data-language-autonym="Kiswahili" data-language-local-name="Suahili" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B9%80%E0%B8%AA%E0%B9%89%E0%B8%99%E0%B8%A3%E0%B8%AD%E0%B8%9A%E0%B8%A7%E0%B8%87" title="เส้นรอบวง – Thai" lang="th" hreflang="th" data-title="เส้นรอบวง" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Sirkumperensiya" title="Sirkumperensiya – Tagalog" lang="tl" hreflang="tl" data-title="Sirkumperensiya" data-language-autonym="Tagalog" data-language-local-name="Tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/%C3%87evre_(geometri)" title="Çevre (geometri) – Turcica" lang="tr" hreflang="tr" data-title="Çevre (geometri)" data-language-autonym="Türkçe" data-language-local-name="Turcica" 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%9E%D0%BA%D1%80%D1%83%D0%B6%D0%BD%D1%96%D1%81%D1%82%D1%8C" title="Окружність – Ucrainica" lang="uk" hreflang="uk" data-title="Окружність" data-language-autonym="Українська" data-language-local-name="Ucrainica" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Chu_vi_h%C3%ACnh_tr%C3%B2n" title="Chu vi hình tròn – Vietnamica" lang="vi" hreflang="vi" data-title="Chu vi hình tròn" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamica" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-za mw-list-item"><a href="https://za.wikipedia.org/wiki/Hopluenz" title="Hopluenz – Zhuang" lang="za" hreflang="za" data-title="Hopluenz" data-language-autonym="Vahcuengh" data-language-local-name="Zhuang" class="interlanguage-link-target"><span>Vahcuengh</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E5%9C%93%E5%91%A8" title="圓周 – Sinica" lang="zh" hreflang="zh" data-title="圓周" data-language-autonym="中文" data-language-local-name="Sinica" 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/%E5%9C%93%E5%91%A8" title="圓周 – Cantonese" lang="yue" hreflang="yue" data-title="圓周" data-language-autonym="粵語" data-language-local-name="Cantonese" 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/Q843905#sitelinks-wikipedia" title="Nexus inter linguas recensere" class="wbc-editpage">Nexus recensere</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="Spatia nominalia"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul 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class="mw-parser-output"><span typeof="mw:File"><a href="/wiki/Vicipaedia:Latinitas" title="Latinitas nondum censa"><img alt="Latinitas nondum censa" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a6/ButtonOrange.svg/8px-ButtonOrange.svg.png" decoding="async" width="8" height="8" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a6/ButtonOrange.svg/12px-ButtonOrange.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a6/ButtonOrange.svg/16px-ButtonOrange.svg.png 2x" data-file-width="480" data-file-height="480" /></a></span></div></div> </div> <div id="siteSub" class="noprint">E Vicipaedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="la" dir="ltr"><p><b>Circumferentia</b> in <a href="/wiki/Geometria" title="Geometria">geometria</a> est <a href="/wiki/Linea_(mathematica)" title="Linea (mathematica)">linea</a> quae per figuram sive curvam clausam circumfertur. </p><p>Circumferentia <a href="/wiki/Circulus" title="Circulus">circuli</a> hac formula computatur: </p> <dl><dd><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 c=2\pi \cdot r}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>c</mi> <mo>=</mo> <mn>2</mn> <mi>π</mi> <mo>⋅</mo> <mi>r</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle c=2\pi \cdot r}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/d9c89b269ab758e5b287ff584085cddde0cfa87b" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:9.328ex; height:2.176ex;" alt="{\displaystyle c=2\pi \cdot r}"></span></dd></dl></dd></dl> <p>Circumferentia <a href="/wiki/Ellipsis" title="Ellipsis">ellipsis</a> hac formula calculari potest: </p> <dl><dd><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 c=4aE(e)}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>c</mi> <mo>=</mo> <mn>4</mn> <mi>a</mi> <mi>E</mi> <mo stretchy="false">(</mo> <mi>e</mi> <mo stretchy="false">)</mo> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle c=4aE(e)}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/03965e54f5e79a8c089496835ee6bfc5477ebdc3" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:11.166ex; height:2.843ex;" alt="{\displaystyle c=4aE(e)}"></span></dd></dl></dd></dl> <p>ubi circumferentia c, longitudo axis semi-maioris a, <a href="/wiki/Eccentricitas" title="Eccentricitas">eccentricitas</a> <a href="/wiki/Ellipsis" title="Ellipsis">ellipsis</a> e, et completa functio elliptica integralis generis secundi<a class="external autonumber" href="https://en.wikipedia.org/wiki/Elliptic_integral#Complete_elliptic_integral_of_the_second_kind">[1]</a> E </p><p>Aequatio circuli in <a href="/wiki/Geometria_analytica" title="Geometria analytica">geometria analytica</a> est: </p> <dl><dd><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 (x-h)^{2}+(y-k)^{2}=r^{2}\,}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mo stretchy="false">(</mo> <mi>x</mi> <mo>−</mo> <mi>h</mi> <msup> <mo stretchy="false">)</mo> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> <mo>+</mo> <mo stretchy="false">(</mo> <mi>y</mi> <mo>−</mo> <mi>k</mi> <msup> <mo stretchy="false">)</mo> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> <mo>=</mo> <msup> <mi>r</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> <mspace width="thinmathspace" /> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle (x-h)^{2}+(y-k)^{2}=r^{2}\,}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/a7cbf48b0af05810fe31414d20ef03eec7a56a76" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:24.872ex; height:3.176ex;" alt="{\displaystyle (x-h)^{2}+(y-k)^{2}=r^{2}\,}"></span></dd></dl></dd></dl> <p>ubi <i>(h,k)</i> centrum et <i>r</i> <a href="/wiki/Radius_(geometria)" class="mw-redirect" title="Radius (geometria)">radius</a> circuli est. </p> <table class="wikitable"> <caption><a href="/wiki/Geometria" title="Geometria">Figurae geometricae communes</a> </caption> <tbody><tr> <th><a href="/wiki/Triangulum" title="Triangulum">Triangulum</a> </th> <th><a href="/wiki/Parallelogrammum" title="Parallelogrammum">Parallelogrammum</a> </th> <th><a href="/wiki/Rectangulum" title="Rectangulum">Rectangulum</a> </th> <th><a href="/wiki/Quadrum" title="Quadrum">Quadrum</a> </th> <th><a href="/wiki/Circulus" title="Circulus">Circulus</a> </th> <th><a href="/wiki/Pyramis_(geometria)" title="Pyramis (geometria)">Pyramis</a> </th> <th><a href="/wiki/Cubus" title="Cubus">Cubus</a> </th> <th><a href="/wiki/Sphaera" title="Sphaera">Sphaera</a> </th></tr> <tr> <td><span typeof="mw:File"><a href="/wiki/Fasciculus:Nsign_triangulum.JPG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/f/fd/Nsign_triangulum.JPG/100px-Nsign_triangulum.JPG" decoding="async" width="100" height="52" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/fd/Nsign_triangulum.JPG/150px-Nsign_triangulum.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/fd/Nsign_triangulum.JPG/200px-Nsign_triangulum.JPG 2x" data-file-width="242" data-file-height="126" /></a></span> </td> <td><span typeof="mw:File"><a href="/wiki/Fasciculus:Geometri_parallellogram.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/4/40/Geometri_parallellogram.png" decoding="async" width="100" height="100" class="mw-file-element" data-file-width="100" data-file-height="100" /></a></span> </td> <td><span typeof="mw:File"><a href="/wiki/Fasciculus:Rectangle.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Rectangle.svg/100px-Rectangle.svg.png" decoding="async" width="100" height="53" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Rectangle.svg/150px-Rectangle.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Rectangle.svg/200px-Rectangle.svg.png 2x" data-file-width="775" data-file-height="410" /></a></span> </td> <td><span typeof="mw:File"><a href="/wiki/Fasciculus:Regular_quadrilateral.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f7/Regular_quadrilateral.svg/100px-Regular_quadrilateral.svg.png" decoding="async" width="100" height="100" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f7/Regular_quadrilateral.svg/150px-Regular_quadrilateral.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f7/Regular_quadrilateral.svg/200px-Regular_quadrilateral.svg.png 2x" data-file-width="400" data-file-height="400" /></a></span> </td> <td><span typeof="mw:File"><a href="/wiki/Fasciculus:Circle_-_black_simple.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a0/Circle_-_black_simple.svg/100px-Circle_-_black_simple.svg.png" decoding="async" width="100" height="100" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a0/Circle_-_black_simple.svg/150px-Circle_-_black_simple.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a0/Circle_-_black_simple.svg/200px-Circle_-_black_simple.svg.png 2x" data-file-width="500" data-file-height="500" /></a></span> </td> <td><span typeof="mw:File"><a href="/wiki/Fasciculus:Nsign_pyris.JPG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Nsign_pyris.JPG/100px-Nsign_pyris.JPG" decoding="async" width="100" height="74" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Nsign_pyris.JPG/150px-Nsign_pyris.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/b/b0/Nsign_pyris.JPG 2x" data-file-width="179" data-file-height="132" /></a></span> </td> <td><span typeof="mw:File"><a href="/wiki/Fasciculus:Cubic_graph.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/51/Cubic_graph.svg/100px-Cubic_graph.svg.png" decoding="async" width="100" height="100" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/51/Cubic_graph.svg/150px-Cubic_graph.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/51/Cubic_graph.svg/200px-Cubic_graph.svg.png 2x" data-file-width="402" data-file-height="402" /></a></span> </td> <td><span typeof="mw:File"><a href="/wiki/Fasciculus:Sphere_wireframe_10deg_6r_black.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/37/Sphere_wireframe_10deg_6r_black.svg/100px-Sphere_wireframe_10deg_6r_black.svg.png" decoding="async" width="100" height="100" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/37/Sphere_wireframe_10deg_6r_black.svg/150px-Sphere_wireframe_10deg_6r_black.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/37/Sphere_wireframe_10deg_6r_black.svg/200px-Sphere_wireframe_10deg_6r_black.svg.png 2x" data-file-width="800" data-file-height="800" /></a></span> </td></tr></tbody></table> <div class="mw-heading mw-heading2"><h2 id="Nexus_interni">Nexus interni</h2></div> <ul><li><a href="/wiki/Diametros" title="Diametros">Diametros</a></li> <li><a href="/wiki/Gradus_anguli" title="Gradus anguli">Gradus anguli</a></li> <li><a href="/wiki/Numerus_pi" title="Numerus pi">Numerus pi</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Nexus_externi">Nexus externi</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Circumferentia&veaction=edit&section=1" title="Recensere partem: Nexus externi" class="mw-editsection-visualeditor"><span>recensere</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Circumferentia&action=edit&section=1" title="Edit section's source code: Nexus externi"><span>fontem recensere</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="http://mathworld.wolfram.com/Circumference.html">De circumferentia</a> in encyclopaedia Wolfram MathWorld <style data-mw-deduplicate="TemplateStyles:r3389956">.mw-parser-output .existinglinksgray a,.mw-parser-output .existinglinksgray a:visited{color:gray}.mw-parser-output .existinglinksgray a.new{color:#ba0000}.mw-parser-output .existinglinksgray a.new:visited{color:#a55858}</style><span class="existinglinksgray" style="font-size:0.95em; color:gray;"><b>(<a href="/wiki/Anglice" class="mw-redirect" title="Anglice">Anglice</a>)</b></span></li></ul>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1&useformat=desktop" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Receptum de "<a dir="ltr" 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