OMM 2015 Problem 5
Sea el incentro de un triángulo acutángulo . La recta corta por segunda vez al circuncírculo del triángulo en . Sean el pie de la altura desde sobre y la reflexión de con respecto a . Muestra que los puntos , y son colineales.
Official text Mexican Mathematical Olympiad 2015 official paper, page 2. Quoted with source.
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