若点P为
内一点,过点P的最长弦长为8,最短弦长为4,则线段
长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
A.2 | B.![]() | C.3 | D.![]() |
更新时间:2023-12-09 00:16:27
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【推荐1】如图,AB是⊙O的直径,点C在⊙O上,CD⊥AB,垂足为D,点E是⊙O上的动点(不与C重合),点F为CE的中点,若AD=2,CD=4,则DF的最大值为( )
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