Home›Browse›complete quadrilateral🌐EnglishEnglishEspañolFrançaisPolskiSvenskaРусский中文EntityQ28092803· pop 6complete quadrilateralSign in to saveAlso known as tetragramfour lines that determine six distinct pointsAvailable in 6 languagesEspañolFrançais中文HebrewPolskiSvenskavia Wikidata sitelinks · CC0