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Angle Bisector

作者:5P=1CS
主题:角, 线段
Angle bisection with compass and straightedge http://en.wikipedia.org/wiki/Bisection http://en.wikipedia.org/wiki/File:Bisection_construction.gif Again, http://en.wikipedia.org/wiki/Bisection http://en.wikipedia.org/wiki/File:Bisection_construction.gif

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