Construction of Rhombic Dodecahedron

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Theorem

The rhombic dodecahedron can be constructed as follows:

Take a cube $K$ embedded in $3$-dimensional space.

Place $6$ more cubes, each congruent with $K$, so that one face of each coincides with a different face of $K$.

Join the vertices of $K$ to the centers of the adjacent cubes to describe square pyramids whose apices are the centers of the adjacent cubes and whose bases are the faces of $K$.

The polyhedron formed by the $6$ square pyramids so formed, together with $K$, is a rhombic dodecahedron.


Proof



Sources