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# wanted, 4 equilaterals on sides of # 1991 Kyiv City MO 8.3

Source:

July 18, 2021
parallelogramgeometryEquilateral

Problem Statement

On the sides of the parallelogram ABCDABCD outside it are constructed equilateral triangles ABMABM, BCNBCN, CDPCDP, ADQADQ. Prove that MNPQMNPQ is a parallelogram.
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