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旁心是旁切圆的圆心,有三个

Posted by lings at 2005-07-20 22:39:42 on Problem 2504
In Reply To:Re:三角形有5心,内心,外心,重心,垂心,旁心(外角平分线,据说有些性质但没接触过) Posted by:lings at 2005-07-20 22:39:16


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