如图,
是
的直径,点
在
上,直线
与
相切线于点
,若
,则
的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/26/9afde6d5-e30b-4ad0-bce1-9bbb8beff5eb.png?resizew=144)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663aa29cf0f19e37809eb6ea70c4e767.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f63978a044053d276a62764710686b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/26/9afde6d5-e30b-4ad0-bce1-9bbb8beff5eb.png?resizew=144)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2024-02-26 15:58:29
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【推荐1】如图,在
中,AC=BC,点D在AC边上,点E在CB的延长线上,DE与AB相交于点F,若∠C=50°,∠E=25°,则∠BFD的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/20/9800663c-21a8-4426-996a-571a972183bd.png?resizew=196)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,直线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb1b8b4afe4c4479847b1e346c9207a4.png)
的直角顶点B在直线
上,
分别交直线
于点D,点E.若
,则
的度数是( )
![](https://img.xkw.com/dksih/QBM/2022/4/27/2973798691078144/2986350835286016/STEM/a5e42ab3-ff9b-41db-8df6-8532e02ecb2c.png?resizew=200)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb1b8b4afe4c4479847b1e346c9207a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a7220edcc4d4f0236dfc15ed33fbfe8.png)
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【推荐1】下列命题中正确的有( )个
①不在同一条直线上的三点确定一个圆.②平分弦的直径平分弦所对的弧.③同弧所对的圆周角相等.④圆的两条平行弦所夹的弧相等.
①不在同一条直线上的三点确定一个圆.②平分弦的直径平分弦所对的弧.③同弧所对的圆周角相等.④圆的两条平行弦所夹的弧相等.
A.1 | B.2 | C.3 | D.4 |
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【推荐2】如图,点A、B、C、D、E在⊙O上,
的度数为60°,则∠B+∠D的度数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d84d1e8115cb9322e5f556fc0f53c8c9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/2/c8972a36-bfeb-4916-98c5-6203de2bc421.png?resizew=126)
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【推荐1】如图,
为圆O的直径,且AB=8,C为圆上任意一点,连接
、
,以
为边作等边三角形
,以
为边作正方形
,连接
.若
为a,
为b,
为c,则下列关系式成立的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/94e4bb88-6d14-464a-b5aa-b00b5b502e62.png?resizew=228)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/94e4bb88-6d14-464a-b5aa-b00b5b502e62.png?resizew=228)
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【推荐2】如图,在平面直角坐标系中,
与
轴相切于点A,与
轴交于点
,连接
并延长交
于点D,交y轴于点E,连接
并延长交x轴于点F,已知点D的坐标为
,且点A是
的中点,则点B的横坐标为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/5/3e735b0b-94cd-4884-b9d2-fc5e88c7b5c3.png?resizew=192)
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【推荐1】如图,
为
外一点,
与
相切于
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是
上的一个动点,若
,
,则
的最小值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/f02a9323-f347-4594-82b1-49099a6164a0.png?resizew=219)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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【推荐2】如图,
上经过点A的切线交直径
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