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八年级数学：这题怎么求PE+PB+PC最小值？作三角形旋转是主要方法
八年级数学：这题怎么求PE+PB+PC最小值？作三角形旋转是主要方法，同学对于此题的解题方法可以举一反三。
初中数学：几何最值，将军饮马，费马点，胡不归，隐形圆，阿氏圆258/333
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