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MathNet 2015-part-05 — 191 problems (EN–VI) Question 83

Math Olympiad Vault · MathNet 2015-part-05 — 191 problems (EN–VI)

Question 83

Let $ABC$ be a triangle, $\Gamma$ its circumcircle, $I$ its incenter, and $\omega$ a tangent circle to the line $AI$ at $I$ and to the side $BC$. Prove that the circles $\Gamma$ and $\omega$ are tangent.