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多谢。不过有个问题。在第二步中圆规两脚打开的宽度是个近似值，有没有更精确的方法呢？
imbane
(imbane)
(#284157@0)
Last Updated: 2001-12-3
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求助： 如何畫出正 7 邊形？ 多謝了！
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