如图,AB为圆O的直径,AC与圆O相切于点A,BC交圆O于点D,点E是AC的中点,ED与AB的延长线相交于点F. (1)求证;DE为圆O的切线(2)求证:AB:AC=BF:DF
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![如图,AB为圆O的直径,AC与圆O相切于点A,BC交圆O于点D,点E是AC的中点,ED与AB的延长线相交于点F. (1)求证;DE为圆O的切线(2)求证:AB:AC=BF:DF](/uploads/image/z/9847151-71-1.jpg?t=%E5%A6%82%E5%9B%BE%2CAB%E4%B8%BA%E5%9C%86O%E7%9A%84%E7%9B%B4%E5%BE%84%2CAC%E4%B8%8E%E5%9C%86O%E7%9B%B8%E5%88%87%E4%BA%8E%E7%82%B9A%2CBC%E4%BA%A4%E5%9C%86O%E4%BA%8E%E7%82%B9D%2C%E7%82%B9E%E6%98%AFAC%E7%9A%84%E4%B8%AD%E7%82%B9%2CED%E4%B8%8EAB%E7%9A%84%E5%BB%B6%E9%95%BF%E7%BA%BF%E7%9B%B8%E4%BA%A4%E4%BA%8E%E7%82%B9F.++%281%29%E6%B1%82%E8%AF%81%EF%BC%9BDE%E4%B8%BA%E5%9C%86O%E7%9A%84%E5%88%87%E7%BA%BF%EF%BC%882%EF%BC%89%E6%B1%82%E8%AF%81%EF%BC%9AAB%3AAC%3DBF%3ADF)
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来源:学生作业帮助网 编辑:作业帮 时间:2024/07/11 09:55:35