To familiarize herself with a CNC milling machine, a friend wants to make some 12-sided gaming dice (regular dodecahedrons) out of solid aluminum. Her question: what is the dihedral angle between any two adjacent faces?

(In reply to solution by Charlie)

Good job, Charlie! Your solution (correct, BTW) is just one fourth as long as mine. It helps that you used spherical trig; I used planar trig. Heck, I never even heard of spherical trig! Guess I have more reading to do. lol

Posted by Bryan on 2003-03-31 09:37:00