Previously: security engineer at Square, co-author of HackLang, put the 's' in https at Facebook. Maker of CTFs.
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A dodecahedron is a solid made from 12 pentagons. It is one of only five Platonic solids.
My interest in dodecahedron started in 2000, when playing around with Pov-Ray. I still have my original code!
This version is more fun, because it's interactive. Use the slider to fold or unfold the solid, use the mouse to change the rotation.