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MathNet 2019-part-03 — 184 problems (EN–VI) Question 134

Math Olympiad Vault · MathNet 2019-part-03 — 184 problems (EN–VI)

Question 134

Consider a triangle $ABC$ with incircle $\omega$ that is respectively tangent to sides $BC$, $CA$ and $AB$ at $D$, $E$ and $F$. Points $P$, $Q$ are inside of $\angle A$ so that $FP = FB$, $FP \parallel AC$ and $EQ = EC$, $EQ \parallel AB$. Prove that $P$, $Q$ and $D$ are collinear.