Online Geometry Problems

Online Geometry Problem 768: Parallelogram with Equilateral Triangles on Sides. Level: High School, College, Mathematics Education

The figure shows a parallelogram ABCD with equilateral triangles ABE, BCF,CDG, and ADH. Prove that EFGH is a parallelogram.
 

Parallelograms with Equilateral Triangles
 


 

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