如图,AB是⊙O的一条弦,OD⊥AB于点C,交⊙O于点D,连接OA.若AB=4,CD=1,则⊙O的半径为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/7/c3b0bacc-3466-4a95-a25f-aa78625c1106.png?resizew=118)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/7/c3b0bacc-3466-4a95-a25f-aa78625c1106.png?resizew=118)
A.5 | B.![]() | C.3 | D.![]() |
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更新时间:2019-01-05 23:58:37
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【推荐1】如图正方形
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A.![]() | B.2 | C.![]() | D.4-2![]() |
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【推荐1】如图,
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,已知AB是⊙O的直径,弦CD⊥AB于E,连接BC、BD、AC,下列结论中不一定正确的是( )
![](https://img.xkw.com/dksih/QBM/2018/11/4/2068536427937792/2069862574546944/STEM/35dc4d9d5ee648fc83b4287fd0376dd0.png?resizew=100)
![](https://img.xkw.com/dksih/QBM/2018/11/4/2068536427937792/2069862574546944/STEM/35dc4d9d5ee648fc83b4287fd0376dd0.png?resizew=100)
A.∠ACB=90° | B.OE=BE | C.BD=BC | D.![]() |
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