Assertion: polyhedron's edge | /r/HasProperty | characterized by same number of polygons
Facets:
Source sentences:
text: The Platonic solids are within the larger grouping known as regular polyhedrons, in which the polygons of each are regular and congruent (that is, all polygons are identical in size and shape and all edges are identical in length), and are characterized by the same number of polygons meeting at each vertex.