如图BD为圆o的直径,AB=AC,AD交BC于E,AE=2,ED=4..(1)求证三角形ABE相似于三角形ADB(2)求AB长(3)延长DB到F,使BF=BO,连结FA 判断直线FA于圆O是否相切,说明理由
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![如图BD为圆o的直径,AB=AC,AD交BC于E,AE=2,ED=4..(1)求证三角形ABE相似于三角形ADB(2)求AB长(3)延长DB到F,使BF=BO,连结FA 判断直线FA于圆O是否相切,说明理由](/uploads/image/z/6871690-10-0.jpg?t=%E5%A6%82%E5%9B%BEBD%E4%B8%BA%E5%9C%86o%E7%9A%84%E7%9B%B4%E5%BE%84%2CAB%3DAC%2CAD%E4%BA%A4BC%E4%BA%8EE%2CAE%3D2%2CED%3D4..%281%29%E6%B1%82%E8%AF%81%E4%B8%89%E8%A7%92%E5%BD%A2ABE%E7%9B%B8%E4%BC%BC%E4%BA%8E%E4%B8%89%E8%A7%92%E5%BD%A2ADB%282%29%E6%B1%82AB%E9%95%BF%EF%BC%883%EF%BC%89%E5%BB%B6%E9%95%BFDB%E5%88%B0F%2C%E4%BD%BFBF%3DBO%2C%E8%BF%9E%E7%BB%93FA+%E5%88%A4%E6%96%AD%E7%9B%B4%E7%BA%BFFA%E4%BA%8E%E5%9C%86O%E6%98%AF%E5%90%A6%E7%9B%B8%E5%88%87%2C%E8%AF%B4%E6%98%8E%E7%90%86%E7%94%B1)
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