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CAPS 2020 Problem 1

    Let ABCDABCD be a parallelogram whose diagonals meet at PP . Denote by MM the midpoint of ABAB . Let QQ be a point such that QAQA is tangent to the circumcircle of MADMAD and QBQB is tangent to the circumcircle of MBCMBC . Prove that points Q,M,PQ,M,P are collinear.

    (Patrik Bak, Slovakia)

    Dataset text AI-MO AoPS. Quoted with source.

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