PUMaC 2007 · 几何（A 组） · 第 2 题

PUMaC 2007 — Geometry (Division A) — Problem 2

A,B,C, and D are all on a circle, and ABCD is a convex quadrilateral. If AB = 13, BC = 13, CD = 37, and AD = 47, what is the area of ABCD?

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