MathDB

315

Part of 1981 All Soviet Union Mathematical Olympiad

Problems(1)

ASU 315 All Soviet Union MO 1981 4 parallelograms => 5th one

Source:

7/23/2019
The quadrangles AMBE,AHBT,BKXMAMBE, AHBT, BKXM, and CKXPCKXP are parallelograms. Prove that the quadrangle ABTEABTE is also parallelogram. (the vertices are mentioned counterclockwise)
geometryparallelogram