🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsРусский日本語EntityQ792528· pop 16· linked from 17 articlesPasch's axiomstatement in plane geometry, used implicitly by Euclid, which cannot be derived from the postulates as Euclid gave themConnectionsEuclidean geometryEntityDavid HilbertEntityCategoriesEuclidean plane geometryFoundations of geometry