MathDB
angle $ARC$ is obtuse.

Source: 2016 239 S2

October 11, 2020
geometry

Problem Statement

In triangle ABCABC, the incircle touches sides ABAB and BCBC at points PP and QQ, respectively. Median of triangle ABCABC from vertex BB meets segment PQP Q at point RR. Prove that angle ARCARC is obtuse.