Comentarii Jbmo 2015 May 2026

A problem involving an acute triangle and perpendicular lines from a midpoint. The goal was to prove an equality between two angles,

. Notes indicate that many participants were able to solve this using analytical or vector methods. Comentarii JBMO 2015

This problem involved minimizing a specific expression given the constraint A problem involving an acute triangle and perpendicular

. Commentary suggests this was a very accessible problem, possibly even at a 5th or 6th-grade level, which resulted in a high number of maximum scores. Comentarii JBMO 2015