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只用圆规确定已知圆的圆心

2016-04-12 19:12:52| 分类：数学趣题 | 标签： |举报 |字号大中小订阅

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意大利数学家马谢罗尼（Lorenzo Mascheroni,1750～1800)证明了一件出人意料的事：只要用一只圆规，就能完成圆规与直尺联合起来才能完成的工作！当然，圆规不能画直线段。这里说的是，凡是用圆规直尺联合起来能够确定的点只用一只圆规也能把这个点确定出来。后来才知道，早在1673年，丹麦人摩尔（George Mohr,1640～1697）的一本书里已经发表了这一惊人的事实。马谢罗尼不过是重新发现了这条定理。

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