🌐EnglishEnglishDeutschEspañolFrançaisNederlandsPortuguêsРусскийالعربية한국어中文日本語EntityQ30587580· pop 6· linked from 27 articlesDehn invariantproperty of polyhedra invariant under scissors congruenceConnectionsflexible polyhedronEntitybasisEntityCategoriesGeometric dissectionPolyhedra