Decagonal Ring of Rhombic Triacontahedra

ring of ten Rhombic Triaconta

Ten rhombic triacontahedra fit perfectly into a decagonal ring. It’s not a “near-miss” — the fit is exact.

I made this with Stella 4d, software you can try for free, or purchase, at http://www.software3d.com/Stella.php.