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Morley’s Theorem

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

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。