如图,AC是⊙O的切线,切点为C,BC是⊙O的直径,AB交⊙O于点D,连接OD,若∠COD=80°,则∠BAC=( )
![](https://img.xkw.com/dksih/QBM/2022/2/2/2907826200821760/3025355157053440/STEM/0dc568857f6646aa8bc3985c301d21e0.png?resizew=125)
![](https://img.xkw.com/dksih/QBM/2022/2/2/2907826200821760/3025355157053440/STEM/0dc568857f6646aa8bc3985c301d21e0.png?resizew=125)
A.100° | B.80° | C.50° | D.40° |
21-22九年级上·河北唐山·期末 查看更多[4]
河北省唐山市古冶区2021-2022学年九年级上学期期末数学试题(已下线)24.2 点和圆、直线和圆的位置关系-2022-2023学年九年级数学上册课后培优分级练(人教版)(已下线)第二十九章 直线与圆的位置关系(A卷-中档卷)-【单元测试】2022-2023学年九年级下数学分层训练AB卷【冀教版】(已下线)2023年四川省眉山市中考数学真题变式题7-12题
更新时间:2022-07-18 18:43:44
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【推荐1】如图,
是
的直径,
是
的切线,连接
交
于点D,连接
,
.则
的度数是( ).
![](https://img.xkw.com/dksih/QBM/2022/4/27/2966926373822464/2969555401261056/STEM/cb0596dd-4056-469e-98c8-32fd503ae52d.png?resizew=135)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,AB是⊙O的直径,AC切⊙O于点A,BC交⊙O于点D.已知⊙O的半径为6,∠C=40°,则劣弧
的长为( )
![](https://img.xkw.com/dksih/QBM/2019/5/27/2212573174267904/2217540851089408/STEM/31a8a36d7b3d4c3eb3f9e6780c0be0df.png?resizew=143)
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【推荐2】将一个含有
的直角三角板按如图所示的位置摆放,一个顶点
与
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与
相切,切点为
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绕点
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上,边
交线段
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