如图,已知⊙O的半径为4,直径AB垂直于弦CD,垂足为点E.若∠B=22.5°,则CD长度为( )
![](https://img.xkw.com/dksih/QBM/2021/12/21/2877125859098624/2881637071110144/STEM/fbcddf18-88f0-4365-9b10-9248fdffe51b.png?resizew=146)
![](https://img.xkw.com/dksih/QBM/2021/12/21/2877125859098624/2881637071110144/STEM/fbcddf18-88f0-4365-9b10-9248fdffe51b.png?resizew=146)
A.![]() | B.4 | C.![]() | D.8 |
21-22九年级上·浙江杭州·阶段练习 查看更多[3]
更新时间:2021-12-27 17:28:32
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【推荐1】如图,点
是⊙
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A.3 | B.4 | C.![]() | D.![]() |
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【推荐2】如图,在半径为5的⊙O中,弦AB=8,OP⊥AB,垂足为点P,则OP的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/9/f09947e8-56da-4730-bfad-52fe9608f8cb.png?resizew=143)
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【推荐1】如图,
内接于
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【推荐2】如图,
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