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The tetrakis hexahedron can be seen to contain 2 types of edges, the 12 edges of the cube, and 24 lateral edges connecting the cube to the apex of the augmented square pyramids on each face.
If its latereral edge lengths are , and the cubic edges are length 1, its surface area is and its volume is .
In order for the tetrakis hexahedron to be convex, it must be the case that ; when , pairs of triangular faces become coplanar and the polyhedron degenerates to a rhombic dodecahedron.
Why do I sometimes see "tetrakishexahedron" (no space)? 4TC 14:31, 29 January 2010 (UTC)[reply]