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In and Out (Posted on 2013-10-24) Difficulty: 2 of 5

ABE and ADF are equilateral triangles inside and outside
respectively of square ABCD.

Prove that C, E, and F are collinear.

See The Solution Submitted by Bractals    
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  Subject Author Date
SolutionTwo more complicated proofs.Jer2013-10-25 09:10:13
SolutionProofJer2013-10-24 14:19:49
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