AMC 8 2013 Problem 23
AMC8 2013 年第 23 题
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Angle ABC of \triangle ABC is a right angle. The sides of \triangle ABC are the diameters of semicircles as shown. The area of the semicircle on \overlineAB equals 8\pi, and the arc of the semicircle on \overlineAC has length 8.5\pi. What is the radius of the semicircle on \overlineBC?
在内，∠ABC 是一个直角。 的三条边是如图所示的三个半圆的直径。 上的半圆面积是 8π， 边上的半圆弧长为 8.5π．那么边上的半圆的半径是多少？ 边
- A.7
- B.7.5
- C.8
- D.8.5
- E.9
正确答案 · Correct Answer
B
解析 · Solution
解析整理中
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