如图,
为
的直径,点
在
上,若
,则
的度数是( )
![](https://img.xkw.com/dksih/QBM/2023/1/6/3147049316818944/3148361348653056/STEM/efb6b2b6a1274f63b461903428657469.png?resizew=103)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea94762f402d355738f4a4daf3585c9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://img.xkw.com/dksih/QBM/2023/1/6/3147049316818944/3148361348653056/STEM/efb6b2b6a1274f63b461903428657469.png?resizew=103)
A.74° | B.48° | C.32° | D.16° |
更新时间:2023-01-08 13:40:28
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【推荐1】如图,
中,
,垂足为
,点
为直线
上方的一个动点,
的面积等于
的面积的
,则当
最小时,
的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/c3e6b3dc-3deb-450c-948f-ed029582fcf1.png?resizew=166)
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【推荐2】如图,已知
中,
,
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取一点
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
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【推荐1】如图,
中,
,过点A作
的平行线交过点C的圆的切线于点D,若
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的度数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccddc5d31898377dd8bdcdb4096ce40e.png)
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【推荐2】如图,在等腰
中,
,
垂直平分线
交
于点
,交
于点
,
的垂直平分线
交
于点
,交
于点
,连接
,
,则
( )
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【推荐1】下列说法中:①半径相等的两个圆是等圆;②相等的弦所对的圆周角相等;③能够互相重合的弧是等弧;④圆的圆心到该圆切线的距离可能大于这个圆的半径,其中正确的个数是( )
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【推荐2】直径为
的圆中有一条长为
的弦,则圆心到这条弦的距离为( ).
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【推荐1】如图,点A为⊙O上一点,如果
,那么半径的长是( )
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【推荐2】如图,在
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与
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分别交于点D,E,连接
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