Rhombic dodecahedron

The rhombic dodecahedron is a solid made from twelve congruent rhombi. The diagonals of the rhombi are in the ratio 1 to root 2. If you attach a prism to each of the faces of the cube that faces inward, so the whole cube is solid, then turn it inside out, you get the rhombic dodecahedron. This also works on an octahedron. For icosahedron and dodecahedron, you get the rhombic tricontahedron instead. This article is a stub. Help us out by expanding it.