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class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%9A%E0%A6%BE%E0%A6%95%E0%A6%A4%E0%A6%BF_(%E0%A6%97%E0%A6%A3%E0%A6%BF%E0%A6%A4)" title="চাকতি (গণিত) – bengali" lang="bn" hreflang="bn" data-title="চাকতি (গণিত)" data-language-autonym="বাংলা" data-language-local-name="bengali" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Corona_circular" title="Corona circular – catalansk" lang="ca" hreflang="ca" data-title="Corona circular" data-language-autonym="Català" data-language-local-name="catalansk" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Mezikru%C5%BE%C3%AD" title="Mezikruží – tjekkisk" lang="cs" hreflang="cs" data-title="Mezikruží" data-language-autonym="Čeština" data-language-local-name="tjekkisk" 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%A3%D0%BD%D0%BA%C4%83_(%D0%B3%D0%B5%D0%BE%D0%BC%D0%B5%D1%82%D1%80%D0%B8)" title="Ункă (геометри) – tjuvasjisk" lang="cv" hreflang="cv" data-title="Ункă (геометри)" data-language-autonym="Чӑвашла" data-language-local-name="tjuvasjisk" 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/Kreisring" title="Kreisring – tysk" lang="de" hreflang="de" data-title="Kreisring" data-language-autonym="Deutsch" data-language-local-name="tysk" 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%94%CE%B1%CE%BA%CF%84%CF%8D%CE%BB%CE%B9%CE%BF%CF%82_(%CE%BC%CE%B1%CE%B8%CE%B7%CE%BC%CE%B1%CF%84%CE%B9%CE%BA%CE%AC)" title="Δακτύλιος (μαθηματικά) – græsk" lang="el" hreflang="el" data-title="Δακτύλιος (μαθηματικά)" data-language-autonym="Ελληνικά" data-language-local-name="græsk" 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/Annulus_(mathematics)" title="Annulus (mathematics) – engelsk" lang="en" hreflang="en" data-title="Annulus (mathematics)" data-language-autonym="English" data-language-local-name="engelsk" 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/Ringo_(geometrio)" title="Ringo (geometrio) – esperanto" lang="eo" hreflang="eo" data-title="Ringo (geometrio)" 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/Corona_circular" title="Corona circular – spansk" lang="es" hreflang="es" data-title="Corona circular" data-language-autonym="Español" data-language-local-name="spansk" 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/R%C3%B5ngas" title="Rõngas – estisk" lang="et" hreflang="et" data-title="Rõngas" data-language-autonym="Eesti" data-language-local-name="estisk" 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/Koroa_zirkular" title="Koroa zirkular – baskisk" lang="eu" hreflang="eu" data-title="Koroa zirkular" data-language-autonym="Euskara" data-language-local-name="baskisk" 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/%D8%B7%D9%88%D9%82_(%D8%B1%DB%8C%D8%A7%D8%B6%DB%8C%D8%A7%D8%AA)" title="طوق (ریاضیات) – persisk" lang="fa" hreflang="fa" data-title="طوق (ریاضیات)" data-language-autonym="فارسی" data-language-local-name="persisk" 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/Annulus" title="Annulus – finsk" lang="fi" hreflang="fi" data-title="Annulus" data-language-autonym="Suomi" data-language-local-name="finsk" 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/Couronne_(g%C3%A9om%C3%A9trie)" title="Couronne (géométrie) – fransk" lang="fr" hreflang="fr" data-title="Couronne (géométrie)" data-language-autonym="Français" data-language-local-name="fransk" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%98%D7%91%D7%A2%D7%AA_(%D7%92%D7%90%D7%95%D7%9E%D7%98%D7%A8%D7%99%D7%94)" title="טבעת (גאומטריה) – hebraisk" lang="he" hreflang="he" data-title="טבעת (גאומטריה)" data-language-autonym="עברית" data-language-local-name="hebraisk" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%95%D5%B2%D5%A1%D5%AF_(%D5%A5%D6%80%D5%AF%D6%80%D5%A1%D5%B9%D5%A1%D6%83%D5%B8%D6%82%D5%A9%D5%B5%D5%B8%D6%82%D5%B6)" title="Օղակ (երկրաչափություն) – armensk" lang="hy" hreflang="hy" data-title="Օղակ (երկրաչափություն)" data-language-autonym="Հայերեն" data-language-local-name="armensk" 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/Anulus_(matematika)" title="Anulus (matematika) – indonesisk" lang="id" hreflang="id" data-title="Anulus (matematika)" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesisk" 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/Corona_circolare" title="Corona circolare – italiensk" lang="it" hreflang="it" data-title="Corona circolare" data-language-autonym="Italiano" data-language-local-name="italiensk" 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/%E3%82%A2%E3%83%8B%E3%83%A5%E3%83%A9%E3%82%B9" title="アニュラス – japansk" lang="ja" hreflang="ja" data-title="アニュラス" data-language-autonym="日本語" data-language-local-name="japansk" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Gredzens_(%C4%A3eometrija)" title="Gredzens 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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/Coroan%C4%83_circular%C4%83" title="Coroană circulară – rumænsk" lang="ro" hreflang="ro" data-title="Coroană circulară" data-language-autonym="Română" data-language-local-name="rumænsk" 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%9A%D0%BE%D0%BB%D1%8C%D1%86%D0%BE_(%D0%B3%D0%B5%D0%BE%D0%BC%D0%B5%D1%82%D1%80%D0%B8%D1%8F)" title="Кольцо (геометрия) – russisk" lang="ru" hreflang="ru" data-title="Кольцо (геометрия)" data-language-autonym="Русский" data-language-local-name="russisk" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Kolobar" title="Kolobar – slovensk" lang="sl" hreflang="sl" data-title="Kolobar" 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href="https://uk.wikipedia.org/wiki/%D0%9A%D1%96%D0%BB%D1%8C%D1%86%D0%B5_(%D0%B3%D0%B5%D0%BE%D0%BC%D0%B5%D1%82%D1%80%D1%96%D1%8F)" title="Кільце (геометрія) – ukrainsk" lang="uk" hreflang="uk" data-title="Кільце (геометрія)" data-language-autonym="Українська" data-language-local-name="ukrainsk" 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/H%C3%ACnh_v%C3%A0nh_kh%C4%83n" title="Hình vành khăn – vietnamesisk" lang="vi" hreflang="vi" data-title="Hình vành khăn" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamesisk" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E7%8E%AF%E5%BD%A2" title="环形 – kinesisk" lang="zh" hreflang="zh" data-title="环形" data-language-autonym="中文" data-language-local-name="kinesisk" 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//upload.wikimedia.org/wikipedia/commons/thumb/f/fd/Disambig_bordered_fade.svg/38px-Disambig_bordered_fade.svg.png 2x" data-file-width="236" data-file-height="185" /></span></span><i> For alternative betydninger, se <a href="/wiki/Annulus" class="mw-disambig" title="Annulus">Annulus</a>.</i> <small>(<a href="/wiki/Speciel:Pr%C3%A6fiksindeks/Annulus" title="Speciel:Præfiksindeks/Annulus">Se også artikler, som begynder med Annulus</a>)</small></dd></dl> <figure class="mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/Fil:Annulus.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/88/Annulus.svg/150px-Annulus.svg.png" decoding="async" width="150" height="150" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/88/Annulus.svg/225px-Annulus.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/88/Annulus.svg/300px-Annulus.svg.png 2x" data-file-width="600" data-file-height="600" /></a><figcaption>En <i>annulus</i>.</figcaption></figure> <p>I <a href="/wiki/Geometri" title="Geometri">geometri</a> er en <b>annulus</b> normalt et plant område begrænset af to koncentriske <a href="/wiki/Cirkel" title="Cirkel">cirkler</a>. Annulussen er <a href="/wiki/Homeomorfi" title="Homeomorfi">homeomorf</a> med en <a href="/wiki/Cylinder_(geometri)" title="Cylinder (geometri)">cylinderflade</a>. </p> <table class="infobox sisterproject"> <tbody><tr> <td style="width:50px; height:67px;"><figure class="mw-halign-none" typeof="mw:File"><span><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/50px-Commons-logo.svg.png" decoding="async" width="50" height="67" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/75px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/100px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></span><figcaption></figcaption></figure> </td> <td style="padding-left:5px;"><a href="https://commons.wikimedia.org/wiki/Forside" class="extiw" title="commons:Forside">Wikimedia Commons</a> har medier relateret til: <div style="margin-left: 10px;"> <i><b><a href="https://commons.wikimedia.org/wiki/Category:Annuli" class="extiw" title="commons:Category:Annuli">Annulus (matematik)</a></b></i></div> </td></tr></tbody></table>    </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="">Hentet fra "<a dir="ltr" href="https://da.wikipedia.org/w/index.php?title=Annulus_(matematik)&oldid=10064325">https://da.wikipedia.org/w/index.php?title=Annulus_(matematik)&oldid=10064325</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Speciel:Kategorier" title="Speciel:Kategorier">Kategorier</a>: <ul><li><a href="/wiki/Kategori:Cirkler" title="Kategori:Cirkler">Cirkler</a></li><li><a href="/wiki/Kategori:Geometriske_former" title="Kategori:Geometriske former">Geometriske former</a></li><li><a href="/wiki/Kategori:Element%C3%A6r_geometri" title="Kategori:Elementær geometri">Elementær geometri</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Skjult kategori: <ul><li><a href="/wiki/Kategori:Commons-kategori_p%C3%A5_Wikidata_er_ens_med_lokalt_link" title="Kategori:Commons-kategori på Wikidata er ens med lokalt link">Commons-kategori på Wikidata er ens med lokalt link</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"> Denne side blev senest ændret den 20. september 2019 kl. 09:56.</li> <li id="footer-info-copyright">Tekst er tilgængelig under <a rel="nofollow" class="external text" href="//creativecommons.org/licenses/by-sa/4.0/deed.da">Creative Commons Navngivelse/Del på samme vilkår 4.0</a>; yderligere betingelser kan være gældende. 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