如图,已知点O为直角三角形ABC斜边AB上一点,以O为圆心,OA为半径的圆与BC相切雨点D,与AB相交于点E.(1)试判断AD是否平分角BAC?并说明理由;(2)若BD=3BE,CD=3.求圆O的半径.
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![如图,已知点O为直角三角形ABC斜边AB上一点,以O为圆心,OA为半径的圆与BC相切雨点D,与AB相交于点E.(1)试判断AD是否平分角BAC?并说明理由;(2)若BD=3BE,CD=3.求圆O的半径.](/uploads/image/z/4534816-40-6.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%B7%B2%E7%9F%A5%E7%82%B9O%E4%B8%BA%E7%9B%B4%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E6%96%9C%E8%BE%B9AB%E4%B8%8A%E4%B8%80%E7%82%B9%2C%E4%BB%A5O%E4%B8%BA%E5%9C%86%E5%BF%83%2COA%E4%B8%BA%E5%8D%8A%E5%BE%84%E7%9A%84%E5%9C%86%E4%B8%8EBC%E7%9B%B8%E5%88%87%E9%9B%A8%E7%82%B9D%2C%E4%B8%8EAB%E7%9B%B8%E4%BA%A4%E4%BA%8E%E7%82%B9E.%EF%BC%881%EF%BC%89%E8%AF%95%E5%88%A4%E6%96%ADAD%E6%98%AF%E5%90%A6%E5%B9%B3%E5%88%86%E8%A7%92BAC%3F%E5%B9%B6%E8%AF%B4%E6%98%8E%E7%90%86%E7%94%B1%EF%BC%9B%EF%BC%882%EF%BC%89%E8%8B%A5BD%3D3BE%2CCD%3D3.%E6%B1%82%E5%9C%86O%E7%9A%84%E5%8D%8A%E5%BE%84.)
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