PUMaC 2007 · 几何（B 组） · 第 3 题
PUMaC 2007 — Geometry (Division B) — Problem 3
题目详情
- Suppose that ABCD is a rectangle with sides of length 12 and 18. Let S be the region of points contained in ABCD which are closer to the center of the rectangle than to any of its vertices. Find the area of S.
解析
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Original Explanation
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