Platonic Solids with Duality

These are 2 of the 5 Platonic solids. The Tetrahedron and the Dodecahedron, but each shows their dual. For the Tetrahedron the dual is another Tetrahedron, and for the Dodecahedron it is the Icosahedron. Each of the vertices of the inside solid is the centroid of a face on the outside solid.

M. Breer 12/15/17