MathDB

1991.8.3

Part of Kyiv City MO 1984-93 - geometry

Problems(1)

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

Source:

7/18/2021
On the sides of the parallelogram ABCDABCD outside it are constructed equilateral triangles ABMABM, BCNBCN, CDPCDP, ADQADQ. Prove that MNPQMNPQ is a parallelogram.
parallelogramgeometryEquilateral