olymmath

USAJMO 2024 Problem 1

  • Day 1

Let ABCDABCD be a cyclic quadrilateral with AB=7AB = 7 and CD=8CD = 8 . Point PP and QQ are selected on segment ABAB such that AP=BQ=3AP = BQ = 3 . Points RR and SS are selected on segment CDCD such that CR=DS=2CR = DS = 2 . Prove that PQRSPQRS is a cyclic quadrilateral.

Proposed by Evan O'Dorney

Dataset text AI-MO AoPS. Quoted with source.

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