Problem
Problem of the Day #11
POTD November 30, 2023
Author: qgek
Let ABCD be a tangential quadrilateral, and let I be its incenter. Let R_{XYZ} denote the circumradius of \triangle XYZ. Let R_{ABI} = 6, R_{BCI} = 3, R_{CDI} = 9. Find R_{DAI}.
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