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Making Dice, Part 1 (Posted on 2003-03-31) Difficulty: 4 of 5
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?

See The Solution Submitted by Bryan    
Rating: 3.2500 (8 votes)

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re(2): solution | Comment 3 of 7 |
(In reply to re: solution by Bryan)

When I first heard of spherical trigonometry, by reading Lancelot Hogben's Mathematics in the Making (illustrated with lots of pictures), I wondered why it wasn't covered in H.S. trig courses (at least in the U.S.). It's of much use in converting astronomical coordinates, finding times of sunrise/set, etc. It seems a neglected area, as is the subject of continued fractions.
  Posted by Charlie on 2003-03-31 10:21:09

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