olymmath

OMM 2009 Problem 5

    Considera un triángulo ABCABC y un punto MM sobre el lado BCBC. Sea PP la intersección de las perpendiculares a ABAB por MM y a BCBC por BB, y sea QQ la intersección de las perpendiculares a ACAC por MM y a BCBC por CC. Muestra que PQPQ es perpendicular a AMAM si y solo si MM es el punto medio de BCBC.

    Official text Mexican Mathematical Olympiad 2009 official paper, page 1. Quoted with source.

    A model read this text from the scan of the paper by OCR, with vision/claude@2.1.318 (claude-opus-5-5). No person has checked it against the paper yet.

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