标题: gwd-11-8 [打印本页]
作者: monicars 时间: 2005-10-16 19:17 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: leadership 时间: 2005-10-17 06:32
h=3/2 r, a=r*根号3,三角形面积=1/2 ah
作者: monicars 时间: 2005-10-17 13:09
不好意思,还是不太明白,为什么h= 3/2 r? 为什么 a = r* 根号3?
谢谢
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