下面左图表示用圆规测曲线长度的一种方法先将圆规两脚分开再用圆规脚分割曲线记下分割的总段数n然后测出圆规两脚间的距离l那么曲线的长度l Template




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tomski下面左图表示用圆规测曲线长度的一种方法先将圆规两脚分开再用圆规脚分割曲线记下分割的总段数n然后测出圆规两脚间的距离l那么曲线的长度l coloring