A three-dimensional (3D) shape is a solid shape. 3D shapes have three ... For example, this cuboid above 6 faces, 12 edges and 8 vertices. The table below shows how the faces of some other 3D ...

A 3D shape with regular polygonal faces, meeting at equal angles, is a platonic solid ... polyhedra the number of edges is two less than the sum of the number of vertices and faces.

How few corners can a shape ... solid in 3D space must enclose 4π degrees of curvature, which are usually concentrated at vertices. Regős was smearing out that curvature over edges instead.