🌐فارسیEnglishBahasa IndonesiaDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaTiếng ViệtРусскийالعربيةفارسی中文日本語EntityQ45926· pop 37· linked from 332 articlesطوق (ریاضیات)Also known as ring, annulargeometric surface defined by two concentric circlesWikidata factsImageAnnulus area.svgSources (1)wikidata.orgvia Wikidata · CC0Available in 36 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoالعربيةArmenianConnectionsMöbius stripEntitymathematicsEntityCategoriesCirclesElementary geometryGeometric shapesPlanar surfaces