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APMO 2024 Problem 1

  • Paper

Let ABCA B C be an acute triangle. Let DD be a point on side ABA B and EE be a point on side ACA C such that lines BCB C and DED E are parallel. Let XX be an interior point of BCEDB C E D. Suppose rays DXD X and EXE X meet side BCB C at points PP and QQ, respectively such that both PP and QQ lie between BB and CC. Suppose that the circumcircles of triangles BQXB Q X and CPXC P X intersect at a point Y≠XY \neq X. Prove that points A,XA, X, and YY are collinear.

Dataset text NuminaMath olympiads. Quoted with source.

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