一个圆的几何证明题.AD是△ABC的高,以AD为直径作⊙O分别交AB,AC于点E,F.求证:AE/AF=AC/AB图:
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![一个圆的几何证明题.AD是△ABC的高,以AD为直径作⊙O分别交AB,AC于点E,F.求证:AE/AF=AC/AB图:](/uploads/image/z/9866546-26-6.jpg?t=%E4%B8%80%E4%B8%AA%E5%9C%86%E7%9A%84%E5%87%A0%E4%BD%95%E8%AF%81%E6%98%8E%E9%A2%98.AD%E6%98%AF%E2%96%B3ABC%E7%9A%84%E9%AB%98%2C%E4%BB%A5AD%E4%B8%BA%E7%9B%B4%E5%BE%84%E4%BD%9C%E2%8A%99O%E5%88%86%E5%88%AB%E4%BA%A4AB%2CAC%E4%BA%8E%E7%82%B9E%2CF.%E6%B1%82%E8%AF%81%3AAE%2FAF%3DAC%2FAB%E5%9B%BE%3A)
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