几何——圆已知如图,AF为三角形ABC的角平分线,以BC为直径的圆与边AB交与点D,点E为弧BD的中点,连接CE交AB于H,AH=AC(1)求证:AC于圆O相切(2)若AC=6 AB=10 求EC的长
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![几何——圆已知如图,AF为三角形ABC的角平分线,以BC为直径的圆与边AB交与点D,点E为弧BD的中点,连接CE交AB于H,AH=AC(1)求证:AC于圆O相切(2)若AC=6 AB=10 求EC的长](/uploads/image/z/5900737-49-7.jpg?t=%E5%87%A0%E4%BD%95%E2%80%94%E2%80%94%E5%9C%86%E5%B7%B2%E7%9F%A5%E5%A6%82%E5%9B%BE%2CAF%E4%B8%BA%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E7%9A%84%E8%A7%92%E5%B9%B3%E5%88%86%E7%BA%BF%2C%E4%BB%A5BC%E4%B8%BA%E7%9B%B4%E5%BE%84%E7%9A%84%E5%9C%86%E4%B8%8E%E8%BE%B9AB%E4%BA%A4%E4%B8%8E%E7%82%B9D%2C%E7%82%B9E%E4%B8%BA%E5%BC%A7BD%E7%9A%84%E4%B8%AD%E7%82%B9%2C%E8%BF%9E%E6%8E%A5CE%E4%BA%A4AB%E4%BA%8EH%2CAH%3DAC%EF%BC%881%EF%BC%89%E6%B1%82%E8%AF%81%EF%BC%9AAC%E4%BA%8E%E5%9C%86O%E7%9B%B8%E5%88%87%EF%BC%882%EF%BC%89%E8%8B%A5AC%3D6+AB%3D10+%E6%B1%82EC%E7%9A%84%E9%95%BF)
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