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由 Raceleader 於 星期五 五月 23, 2003 9:18 pm
[問題]Line segments
由 E.T 於 星期五 五月 23, 2003 9:13 pm
Given two circles, draw the tangents from the center of each circle to the sides of the other.
Then the line segments AB and CD are of equal length.
How to prove AB = CD ?