🌐ไทยEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaTiếng ViệtРусскийالعربيةفارسیไทย한국어中文日本語EntityQ207014· pop 47· linked from 254 articlesสัจพจน์เส้นขนานAlso known as Euclid's fifth postulate, fifth postulateaxiom in Euclidean geometryWikidata factsImageParallel postulate en.svgSources (3)wikidata.orgde.wikipedia.orgcut-the-knot.orgvia Wikidata · CC0Gallery (4)Available in 45 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoالعربيةAzerbaijaniConnectionsPythagorean theoremEntityaxiomEntityCategoriesAncient Greek mathematicsElementary geometryFoundations of geometryHistory of geometryNon-Euclidean geometry