如图,△ABC内接于圆o,AD为直径,CF交AD于E,交AB于F,求证:AC2=AF x AB我急用、答得好加分为什么∵AD是直径,AD⊥CG ∴弧AG=弧AC
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![如图,△ABC内接于圆o,AD为直径,CF交AD于E,交AB于F,求证:AC2=AF x AB我急用、答得好加分为什么∵AD是直径,AD⊥CG ∴弧AG=弧AC](/uploads/image/z/13621279-31-9.jpg?t=%E5%A6%82%E5%9B%BE%2C%E2%96%B3ABC%E5%86%85%E6%8E%A5%E4%BA%8E%E5%9C%86o%2CAD%E4%B8%BA%E7%9B%B4%E5%BE%84%2CCF%E4%BA%A4AD%E4%BA%8EE%2C%E4%BA%A4AB%E4%BA%8EF%2C%E6%B1%82%E8%AF%81%EF%BC%9AAC2%3DAF+x+AB%E6%88%91%E6%80%A5%E7%94%A8%E3%80%81%E7%AD%94%E5%BE%97%E5%A5%BD%E5%8A%A0%E5%88%86%E4%B8%BA%E4%BB%80%E4%B9%88%E2%88%B5AD%E6%98%AF%E7%9B%B4%E5%BE%84%EF%BC%8CAD%E2%8A%A5CG+%E2%88%B4%E5%BC%A7AG%3D%E5%BC%A7AC)
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