🌐EnglishEnglishDeutschEspañolFrançaisPolskiPortuguêsРусскийالعربيةفارسی日本語EntityQ138224· pop 13· linked from 57 articlesSaccheri quadrilateralAlso known as Khayyam–Saccheri quadrilateralquadrilateral with two equal sides perpendicular to the baseWikidata factsImageSaccheri quads.svgSources (1)wikidata.orgvia Wikidata · CC0Available in 13 languagesEspañolDeutschРусскийPortuguêsالعربيةAzerbaijaniFinnishHebrewPolskiRomanianConnectionsangleEntityGiovanni Girolamo SaccheriEntityCategoriesHyperbolic geometryTypes of quadrilaterals