I made this using *Stella 4d*, software you can try for free right here.

## A Compound of Two Irregular Dodecahedra

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I made this using *Stella 4d*, software you can try for free right here.

Icosahedra have twenty faces. In the image above, only twelve of those triangles are visible; the other eight have been hidden, so you can see what this solid looks like on the inside. The twelve which remain have pyritohedral symmetry — the symmetry of a volleyball.

I made this using* Stella 4d*, which you can try for free at http://www.software3d.com/Stella.php.

This polyhedron has 12 faces which are regular decagons, 150 quadrilateral faces, and 80 triangular faces, 20 of which are regular. I made it using* Stella 4d*, which you can try for free at http://www.software3d.com/Stella.php.

The pink hendecagons are regular, and there are twenty-two of them.

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