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Pentagon Ratio (Posted on 2013-03-30) Difficulty: 3 of 5
A piece of paper has the precise shape of a regular pentagon. The paper is folded such that a vertex of the pentagon coincides with the midpoint of that side of the pentagon which is farthest from the said vertex.

Determine the ratio of the length of the crease to the length of a side of the pentagon.

See The Solution Submitted by K Sengupta    
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Solution Geometers' Sketchpad says... | Comment 1 of 2
The ratio is 3/2.
  Posted by Charlie on 2013-03-30 12:59:56
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