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MathNet 2020 — Math Olympiad Vault — Part 04 Question 103

Math Olympiad Vault · MathNet 2020 — Math Olympiad Vault — Part 04

Question 103

Let $ABC$ be a triangle and $D$ the point where its angle bisector from $A$ meets $BC$. Circle $\omega$ is tangent to $AC$ at $A$ and passes through $D$. Let $P$ be its second intersection with line $BC$. Given $AC=54$, $AD=63$, $CP=108$, find $AB$.
(A)72
(B)$147/2$
(C)98
(D)99
(E)102