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标题: GWD 12-20 [打印本页]

作者: xianwharton    时间: 2005-12-28 07:41     标题: GWD 12-20

没人问过. 但是我想不通, 三角形在圆内, AB 是直径, 又知道比例, 怎么会求不出圆的周长呢?

Q20:


INE>INE>INE>INE> B

INE>INE> A C

In the figure shown, triangle ABC is inscribed in the circle. What is the circumference of the circle?

(1) AB is a diameter of the circle.

(2) The ratio of the lengths of BC, AC, and AB, respectively, is 3 : 4 :


作者: jojofgasw    时间: 2005-12-28 21:00

知道比例,并不知道数字啊,最后只能将周长用AB表示,可并不知道AB多长啊!


作者: xianwharton    时间: 2005-12-29 21:53

thanks a lto !!!!






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