GWD24-11

Kath1985 · 发表于 2012-10-23 18:40:03

24-11

An equilateral triangle that has an area of 9 3^1/2 is inscribed in a circle. What is the area of the

circle?

A . 6piB. 9piC. 12 piD. 9pi 3^1/2E. 18pi 3^1/2

答案C
请问这题是否有公式 ?

Koothrappali · 发表于 2012-10-23 19:35:30

解法见附件。

Kath1985 · 发表于 2012-10-28 20:09:25

楼主这图真好 GOOOOOOOOOOOOOOOOOOOOOOOOOOD

GWD24-11

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