🌐EnglishEnglishEspañolFrançaisPolskiSvenskaРусский中文EntityQ28092803· pop 6complete quadrilateralAlso known as tetragramfour lines that determine six distinct pointsWikidata factsImageComplete-quads.svgvia Wikidata · CC0Available in 6 languagesEspañolFrançais中文HebrewPolskiSvenskavia Wikidata sitelinks · CC0