AMC 8 2018 Problem 15

AMC8 2018 年第 15 题

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In the diagram below, a diameter of each of the two smaller circles is a radius of the larger circle. If the two smaller circles have a combined area of 1 square unit, then what is the area of the shaded region, in square units?

如下图所示，2 个小圆各自的直径都是大圆的半径，如果这 2 个小圆的面积之和是 1 平方单位，那么图中阴影部分的面积是多少平方单位？

AMC 8 2018 Problem 15 figure

A. $\displaystyle \frac{1}{4}$
B. $\displaystyle \frac{1}{3}$
C. $\displaystyle \frac{1}{2}$
D.1
E. $\displaystyle \frac{\pi}{2}$

正确答案 · Correct Answer

D

解析 · Solution

解析整理中

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