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标题: gwd-4-30 [打印本页]

作者: wanders 时间: 2005-1-20 19:22 标题: gwd-4-30

30,In the figure above, O is the center of the circle. If the area of the shaded region is 2π, what is the value of x?

B. 30

C. 45

D. 60

E. 90

the answer is c, why?? what is the formula

作者: robert 时间: 2005-1-21 14:23

扇形面积/圆的面积=x/360

作者: wanders 时间: 2005-1-25 19:16

谢谢！！

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