如图,在破残的圆形残片上,弦AB的垂直平分线交弧AB于点C,交弦AB于点D,已知AB=8cm,CD=2cm(1)求作此残片所在的圆(不写作法,保留作图痕迹);(2)求出(1)中所作圆的半径
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![如图,在破残的圆形残片上,弦AB的垂直平分线交弧AB于点C,交弦AB于点D,已知AB=8cm,CD=2cm(1)求作此残片所在的圆(不写作法,保留作图痕迹);(2)求出(1)中所作圆的半径](/uploads/image/z/3875515-43-5.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%9C%A8%E7%A0%B4%E6%AE%8B%E7%9A%84%E5%9C%86%E5%BD%A2%E6%AE%8B%E7%89%87%E4%B8%8A%2C%E5%BC%A6AB%E7%9A%84%E5%9E%82%E7%9B%B4%E5%B9%B3%E5%88%86%E7%BA%BF%E4%BA%A4%E5%BC%A7AB%E4%BA%8E%E7%82%B9C%2C%E4%BA%A4%E5%BC%A6AB%E4%BA%8E%E7%82%B9D%2C%E5%B7%B2%E7%9F%A5AB%3D8cm%2CCD%3D2cm%281%29%E6%B1%82%E4%BD%9C%E6%AD%A4%E6%AE%8B%E7%89%87%E6%89%80%E5%9C%A8%E7%9A%84%E5%9C%86%28%E4%B8%8D%E5%86%99%E4%BD%9C%E6%B3%95%2C%E4%BF%9D%E7%95%99%E4%BD%9C%E5%9B%BE%E7%97%95%E8%BF%B9%29%EF%BC%9B%282%29%E6%B1%82%E5%87%BA%281%29%E4%B8%AD%E6%89%80%E4%BD%9C%E5%9C%86%E7%9A%84%E5%8D%8A%E5%BE%84)
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