如图,以等腰三角形ABC的腰AB为圆O的直径的圆O交底边BC于点D ,如图以等腰三角形ABC的腰AB为圆O的直径的圆O交底边BC于点D ,过点D作DE⊥AC,垂足为E,AC交圆O于F点,求证:(1)弧BD=弧DF(2)若圆O的半径为5,
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![如图,以等腰三角形ABC的腰AB为圆O的直径的圆O交底边BC于点D ,如图以等腰三角形ABC的腰AB为圆O的直径的圆O交底边BC于点D ,过点D作DE⊥AC,垂足为E,AC交圆O于F点,求证:(1)弧BD=弧DF(2)若圆O的半径为5,](/uploads/image/z/2522848-40-8.jpg?t=%E5%A6%82%E5%9B%BE%2C%E4%BB%A5%E7%AD%89%E8%85%B0%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E7%9A%84%E8%85%B0AB%E4%B8%BA%E5%9C%86O%E7%9A%84%E7%9B%B4%E5%BE%84%E7%9A%84%E5%9C%86O%E4%BA%A4%E5%BA%95%E8%BE%B9BC%E4%BA%8E%E7%82%B9D+%2C%E5%A6%82%E5%9B%BE%E4%BB%A5%E7%AD%89%E8%85%B0%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E7%9A%84%E8%85%B0AB%E4%B8%BA%E5%9C%86O%E7%9A%84%E7%9B%B4%E5%BE%84%E7%9A%84%E5%9C%86O%E4%BA%A4%E5%BA%95%E8%BE%B9BC%E4%BA%8E%E7%82%B9D+%2C%E8%BF%87%E7%82%B9D%E4%BD%9CDE%E2%8A%A5AC%2C%E5%9E%82%E8%B6%B3%E4%B8%BAE%2CAC%E4%BA%A4%E5%9C%86O%E4%BA%8EF%E7%82%B9%2C%E6%B1%82%E8%AF%81%EF%BC%9A%281%29%E5%BC%A7BD%3D%E5%BC%A7DF%282%29%E8%8B%A5%E5%9C%86O%E7%9A%84%E5%8D%8A%E5%BE%84%E4%B8%BA5%2C)
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