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八年级数学：怎么求∠MAN的大小？求△MAN面积的最小值？半角模型
八年级数学：怎么求∠MAN的大小？求△MAN面积的最小值？半角模型经典考试题型。
初中数学：几何最值，将军饮马，费马点，胡不归，隐形圆，阿氏圆196/333
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