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Sphere in Tetrahedron (Posted on 2005-04-19) Difficulty: 4 of 5
Create a tetrahedron starting with a square ABCD (clockwise), add 2 points E and F placing them halfway between AB and AD respectively.

Fold along lines EF, EC and FC.

Then, form the tetrahedron by keeping triangle EFC as the base, and folding triangles AEF, BEC, and DFC up so that points A, B, and D all meet.

For AB=a find the radius of the largest sphere contained by this tetrahedron

No Solution Yet Submitted by joe    
Rating: 2.5000 (2 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionPuzzle SolutionK Sengupta2008-12-16 04:19:31
AnswerK Sengupta2008-12-14 11:56:13
re: solution -- where the mistake isCharlie2005-04-20 15:27:30
SolutionFollowup on HintRichard2005-04-20 06:23:09
SolutionsolutionCharlie2005-04-19 20:30:16
Hint (partial spoiler)Richard2005-04-19 20:24:36
Some ThoughtsFirst thoughts...Erik O.2005-04-19 18:43:11
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