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« Viviani’s Theorem • Area and the Projection Theorem of a Right Triangle »
September 5, 2007
一个关于直角三角形的定理
直角三角形中，直角的角平分线平分斜边正方形。
—— Roland H. Eddy（纽芬兰纪念大学数学系教授）
a-theorem-about-right-triangles
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September 18, 2007 at 9:11 am
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一个关于直角三角形的定理
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September 18, 2007 at 9:11 am
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