圆O是三角形ABC的外接圆,且AB=AC=13,BC=24,PA是O的切线,A为切点,割线PD过圆心,交O于另一点D,求圆的半径及CD的长
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![圆O是三角形ABC的外接圆,且AB=AC=13,BC=24,PA是O的切线,A为切点,割线PD过圆心,交O于另一点D,求圆的半径及CD的长](/uploads/image/z/8497297-1-7.jpg?t=%E5%9C%86O%E6%98%AF%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E7%9A%84%E5%A4%96%E6%8E%A5%E5%9C%86%2C%E4%B8%94AB%3DAC%3D13%2CBC%3D24%2CPA%E6%98%AFO%E7%9A%84%E5%88%87%E7%BA%BF%2CA%E4%B8%BA%E5%88%87%E7%82%B9%2C%E5%89%B2%E7%BA%BFPD%E8%BF%87%E5%9C%86%E5%BF%83%2C%E4%BA%A4O%E4%BA%8E%E5%8F%A6%E4%B8%80%E7%82%B9D%2C%E6%B1%82%E5%9C%86%E7%9A%84%E5%8D%8A%E5%BE%84%E5%8F%8ACD%E7%9A%84%E9%95%BF)
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