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MathNet 2022-part-04 — 197 problems (EN–VI) Question 98

Math Olympiad Vault · MathNet 2022-part-04 — 197 problems (EN–VI)

Question 98

Given is triangle $ABC$ with $AB \gt AC$. Circles $o_B$, $o_C$ are inscribed in angle $BAC$ with $o_B$ tangent to $AB$ at $B$ and $o_C$ tangent to $AC$ at $C$. Tangent to $o_B$ from $C$ different than $AC$ intersects $AB$ at $K$, and tangent to $o_C$ from $B$ different than $AB$ intersects $AC$ at $L$. Line $KL$ and the angle bisector of $BAC$ intersect $BC$ at points $P$ and $M$, respectively. Prove that $BP = CM$.