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MathNet 2026 — Part 02 Question 119

Math Olympiad Vault · MathNet 2026 — Part 02

Question 119

$O$ Acute triangle $ABC$ of orthocenter $H$ is such that $AB = 48$ e $HC = 14$. the midpoint on the side $AB$ é $M$ and the midpoint of the segment $HC$ é $N$.


a. Show that the angle $MEN$ It's straight.