已知,ab是圆O的直径,取一把直角三角尺,按下图位置摆放,其中直角顶点放在圆心O上,两条直角边与圆O相交于点M和点N,作ME⊥AB,垂足为点E,NF⊥AB,垂足为点F.(1).试说明EF=ME+NF的理由.(2)如果将这
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![已知,ab是圆O的直径,取一把直角三角尺,按下图位置摆放,其中直角顶点放在圆心O上,两条直角边与圆O相交于点M和点N,作ME⊥AB,垂足为点E,NF⊥AB,垂足为点F.(1).试说明EF=ME+NF的理由.(2)如果将这](/uploads/image/z/8746882-34-2.jpg?t=%E5%B7%B2%E7%9F%A5%2Cab%E6%98%AF%E5%9C%86O%E7%9A%84%E7%9B%B4%E5%BE%84%2C%E5%8F%96%E4%B8%80%E6%8A%8A%E7%9B%B4%E8%A7%92%E4%B8%89%E8%A7%92%E5%B0%BA%2C%E6%8C%89%E4%B8%8B%E5%9B%BE%E4%BD%8D%E7%BD%AE%E6%91%86%E6%94%BE%2C%E5%85%B6%E4%B8%AD%E7%9B%B4%E8%A7%92%E9%A1%B6%E7%82%B9%E6%94%BE%E5%9C%A8%E5%9C%86%E5%BF%83O%E4%B8%8A%2C%E4%B8%A4%E6%9D%A1%E7%9B%B4%E8%A7%92%E8%BE%B9%E4%B8%8E%E5%9C%86O%E7%9B%B8%E4%BA%A4%E4%BA%8E%E7%82%B9M%E5%92%8C%E7%82%B9N%2C%E4%BD%9CME%E2%8A%A5AB%2C%E5%9E%82%E8%B6%B3%E4%B8%BA%E7%82%B9E%2CNF%E2%8A%A5AB%2C%E5%9E%82%E8%B6%B3%E4%B8%BA%E7%82%B9F.%281%29.%E8%AF%95%E8%AF%B4%E6%98%8EEF%3DME%2BNF%E7%9A%84%E7%90%86%E7%94%B1.%EF%BC%882%EF%BC%89%E5%A6%82%E6%9E%9C%E5%B0%86%E8%BF%99)
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