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已知金属铁圈内径(直径)长为2.5cm. (1)一个腰长为7cm,底边长为2.4cm的一个三角形铁片(如图1)能否穿过此金属圈,请说明理由; (2)一个两条直角边分别为3cm、4cm的直角三角形...

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