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MathNet 2019-part-08 — 179 problems (EN–VI) Question 94

Math Olympiad Vault · MathNet 2019-part-08 — 179 problems (EN–VI)

Question 94

Let $ABC$ be a triangle with $AB = 5$, $BC = 8$, $CA = 11$. The incircle $\omega$ and $A$-excircle $\Gamma$ are centered at $I_1$ and $I_2$, respectively, and are tangent to $BC$ at $D_1$ and $D_2$, respectively. Find the ratio of the area of $\triangle A I_1 D_1$ to the area of $\triangle A I_2 D_2$.