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

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wanders发表于 2005-1-25 19:16 | 只看该作者

谢谢！！

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robert发表于 2005-1-21 14:23 | 只看该作者

扇形面积/圆的面积=x/360

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