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Isosceles from Regular (Posted on 2012-01-20) Difficulty: 3 of 5
Which regular polygons can be dissected into isosceles triangles by non-intersecting diagonals?

See The Solution Submitted by Jer    
Rating: 5.0000 (1 votes)

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Equilateral triangle are certainly isosceles. | Comment 10 of 13 |
I'm amazed this has cropped up but I will serve as arbiter since it's my problem.

To be an isosceles triangle it must have two equal sides.  An equilateral triangle dies have two equal sides.  Which two?  Any two!

Are we going to wonder if a square counts as a rectangle next?

  Posted by Jer on 2012-01-21 16:18:13
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