All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info

Home > Shapes
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)

Comments: ( Back to comment list | You must be logged in to post comments.)
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

Please log in:
Login:
Password:
Remember me:
Sign up! | Forgot password


Search:
Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (4)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:
Copyright © 2002 - 2017 by Animus Pactum Consulting. All rights reserved. Privacy Information