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Perpendicular Bisector

作者：5P=1CS
主題：線段, 直線
Draw perpendicular bisector of a segment. http://en.wikipedia.org/wiki/Bisection http://en.wikipedia.org/wiki/File:Perpendicular_bisector.gif Again, http://en.wikipedia.org/wiki/Bisection http://en.wikipedia.org/wiki/File:Perpendicular_bisector.gif

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