(1/2)已知A是圆O上一点,半径OC的延长线与过点A的直线交于B点,OC=BC,AC=1/2OB. 若角ACD=45度,OC=2...(1/2)已知A是圆O上一点,半径OC的延长线与过点A的直线交于B点,OC=BC,AC=1/2OB.若角ACD=45度,OC=2,求弦CD的
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![(1/2)已知A是圆O上一点,半径OC的延长线与过点A的直线交于B点,OC=BC,AC=1/2OB. 若角ACD=45度,OC=2...(1/2)已知A是圆O上一点,半径OC的延长线与过点A的直线交于B点,OC=BC,AC=1/2OB.若角ACD=45度,OC=2,求弦CD的](/uploads/image/z/7057501-61-1.jpg?t=%281%2F2%29%E5%B7%B2%E7%9F%A5A%E6%98%AF%E5%9C%86O%E4%B8%8A%E4%B8%80%E7%82%B9%2C%E5%8D%8A%E5%BE%84OC%E7%9A%84%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%B8%8E%E8%BF%87%E7%82%B9A%E7%9A%84%E7%9B%B4%E7%BA%BF%E4%BA%A4%E4%BA%8EB%E7%82%B9%2COC%3DBC%2CAC%3D1%EF%BC%8F2OB.+%E8%8B%A5%E8%A7%92ACD%3D45%E5%BA%A6%2COC%3D2...%281%2F2%29%E5%B7%B2%E7%9F%A5A%E6%98%AF%E5%9C%86O%E4%B8%8A%E4%B8%80%E7%82%B9%2C%E5%8D%8A%E5%BE%84OC%E7%9A%84%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%B8%8E%E8%BF%87%E7%82%B9A%E7%9A%84%E7%9B%B4%E7%BA%BF%E4%BA%A4%E4%BA%8EB%E7%82%B9%2COC%3DBC%2CAC%3D1%EF%BC%8F2OB.%E8%8B%A5%E8%A7%92ACD%3D45%E5%BA%A6%2COC%3D2%2C%E6%B1%82%E5%BC%A6CD%E7%9A%84)
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