I stumbled upon these while playing with tetrahedral-symmetry alterations of a great rhombicuboctahedron, using Stella 4d. You can try this program for free at http://www.software3d.com/Stella.php.
At first glance, the line segments in this tessellation might appear curved, but they are all perfectly straight.
I made this using Stella 4d, which you can try for free at http://www.software3d.com/Stella.php.
In this polyhedron, the twenty hexagonal faces have had triangular cupolae removed from the inside of the solid. I did this with Stella 4d, which you can find at http://www.software3d.com/Stella.php.
Twelve of the faces of this polyhedron are star pentagons, and they are easy to spot. The other sixty faces are isosceles trapezoids, and they’re harder to find because parts of them are hidden inside in the solid. The image below shows where these trapezoids can be found.
I made this using Stella 4d: Polyhedron Navigator, a program you can try for free at http://www.software3d.com/Stella.php.
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