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October 6, 2007 | No comments
莫莱定理
将任意三角形的三个内角三等分,不同内角的相邻三等分线相交于一个等边三角形的顶点。
——Frank Morley,1899
Morley’s Theorem
October 5, 2007 | No comments
矩形无损分割
equidecomposition-of-a-rectangle-and-a-square
注释1:”Others”包括的课件并不属于《PWWS》这本书,但绝对在补充PWWS的思想。
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