如图,AB是⊙O的弦,半径OC⊥AB 于D,若CD=2,⊙O的半径为5,那么AB的长为( )
![](https://img.xkw.com/dksih/QBM/2018/12/13/2095949660602368/2097577882648576/STEM/6ca64aea173749f18ee11de5c010598e.png?resizew=99)
![](https://img.xkw.com/dksih/QBM/2018/12/13/2095949660602368/2097577882648576/STEM/6ca64aea173749f18ee11de5c010598e.png?resizew=99)
A.3 | B.4 | C.6 | D.8 |
更新时间:2018-12-19 13:11:25
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【推荐1】如图,
是
直径,弦
于
,连接
,
.若
,
,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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A.4 | B.![]() | C.3 | D.2 |
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【推荐2】如图,C是以AB为直径的半圆O上一点,连结AC,BC,分别以AC,BC为边向外作正方形ACDE,BCFG,DE,FG,AC,BC的中点分别是M,N,PQ若MP+NQ=12,AC+BC=18,则AB的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/9/cb544ddb-6d52-403f-b9cb-2500c1423074.png?resizew=229)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/9/cb544ddb-6d52-403f-b9cb-2500c1423074.png?resizew=229)
A.![]() | B.![]() | C.![]() | D.![]() |
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