已知Rt△ABC中,角A=30°,角C=90°,D为射线AB上动点,经过点C的圆C与直线AB相切于点D,交射线AC于点E .(1)当点O在边AC上时,若AB=2,求圆O的半径(2)当CD平分∠ACB,求圆O的半径为1,求AC的长第三个图请无
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![已知Rt△ABC中,角A=30°,角C=90°,D为射线AB上动点,经过点C的圆C与直线AB相切于点D,交射线AC于点E .(1)当点O在边AC上时,若AB=2,求圆O的半径(2)当CD平分∠ACB,求圆O的半径为1,求AC的长第三个图请无](/uploads/image/z/7174506-66-6.jpg?t=%E5%B7%B2%E7%9F%A5Rt%E2%96%B3ABC%E4%B8%AD%2C%E8%A7%92A%3D30%C2%B0%2C%E8%A7%92C%3D90%C2%B0%2CD%E4%B8%BA%E5%B0%84%E7%BA%BFAB%E4%B8%8A%E5%8A%A8%E7%82%B9%2C%E7%BB%8F%E8%BF%87%E7%82%B9C%E7%9A%84%E5%9C%86C%E4%B8%8E%E7%9B%B4%E7%BA%BFAB%E7%9B%B8%E5%88%87%E4%BA%8E%E7%82%B9D%2C%E4%BA%A4%E5%B0%84%E7%BA%BFAC%E4%BA%8E%E7%82%B9E+.%EF%BC%881%EF%BC%89%E5%BD%93%E7%82%B9O%E5%9C%A8%E8%BE%B9AC%E4%B8%8A%E6%97%B6%2C%E8%8B%A5AB%3D2%2C%E6%B1%82%E5%9C%86O%E7%9A%84%E5%8D%8A%E5%BE%84%EF%BC%882%EF%BC%89%E5%BD%93CD%E5%B9%B3%E5%88%86%E2%88%A0ACB%2C%E6%B1%82%E5%9C%86O%E7%9A%84%E5%8D%8A%E5%BE%84%E4%B8%BA1%2C%E6%B1%82AC%E7%9A%84%E9%95%BF%E7%AC%AC%E4%B8%89%E4%B8%AA%E5%9B%BE%E8%AF%B7%E6%97%A0)
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