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矩形的性质.矩形ABCD,O为平面内一点,有lOAl^2+lOCl^2=lOBl^2+lODl^2.不成立

Autor:叶晋铭

矩形的性质.矩形ABCD,O为平面内一点,有lOAl^2+lOCl^2=lOBl^2+lODl^2.不成立

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