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标题: gwd-11-8 [打印本页]

作者: 游魂 时间: 2005-9-23 21:08 标题: gwd-11-8

Q8:

An equilateral triangle that has an area of 9 倍根号3 is inscribed in a circle. What is the area of the circle?

这道题怎么考虑？谢谢！

作者: apply1 时间: 2005-9-23 21:44

h=3/2 r, a=r*根号3,三角形面积=1/2 ah

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