Geometry, Theorems and Problems

Geometry Problem 245. Parallelogram with Equilateral triangles. Congruence

In the figure, equilateral triangles BCE and CDF are constructed on the sides BC and CD of a parallelogram ABCD. Prove that AEF is an equilateral triangle. View or post a solution.

 

Elearning 245: Parallelogram and equiilateral triangles 

 

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