A是以BC为直径的圆O上一点,AD垂直BC于D,过点B做圆O切线,与CA的延长线交于E,G是AD中点,连结CG并延长BE相交于F,延长AF与CB延长线交与P(图没照到) 1.求证BF=EF,2求证 PA是圆O切线
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![A是以BC为直径的圆O上一点,AD垂直BC于D,过点B做圆O切线,与CA的延长线交于E,G是AD中点,连结CG并延长BE相交于F,延长AF与CB延长线交与P(图没照到) 1.求证BF=EF,2求证 PA是圆O切线](/uploads/image/z/1686287-47-7.jpg?t=A%E6%98%AF%E4%BB%A5BC%E4%B8%BA%E7%9B%B4%E5%BE%84%E7%9A%84%E5%9C%86O%E4%B8%8A%E4%B8%80%E7%82%B9%2CAD%E5%9E%82%E7%9B%B4BC%E4%BA%8ED%2C%E8%BF%87%E7%82%B9B%E5%81%9A%E5%9C%86O%E5%88%87%E7%BA%BF%2C%E4%B8%8ECA%E7%9A%84%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%BA%A4%E4%BA%8EE%2CG%E6%98%AFAD%E4%B8%AD%E7%82%B9%2C%E8%BF%9E%E7%BB%93CG%E5%B9%B6%E5%BB%B6%E9%95%BFBE%E7%9B%B8%E4%BA%A4%E4%BA%8EF%2C%E5%BB%B6%E9%95%BFAF%E4%B8%8ECB%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%BA%A4%E4%B8%8EP%EF%BC%88%E5%9B%BE%E6%B2%A1%E7%85%A7%E5%88%B0%EF%BC%89+1.%E6%B1%82%E8%AF%81BF%3DEF%2C2%E6%B1%82%E8%AF%81+PA%E6%98%AF%E5%9C%86O%E5%88%87%E7%BA%BF)
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