如图,
为
的直径,
为
外一点,过
作
的切线,切点为
,连接
交
于
,
,点
在
右侧的半圆周上运动(不与
,
重合),则
的大小是( )
![](https://img.xkw.com/dksih/QBM/2021/12/13/2871684512808960/2882103649214464/STEM/20175a42-34ad-43f6-8b71-5beff535d97b.png?resizew=192)
![](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/5c72c070f4f4d2b44927391b59a1e755.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6d93322c98f9c7032ce2b4474bd9dd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cd1bc0388e7fad3e849ca39c67f5034.png)
![](https://img.xkw.com/dksih/QBM/2021/12/13/2871684512808960/2882103649214464/STEM/20175a42-34ad-43f6-8b71-5beff535d97b.png?resizew=192)
A.19° | B.38° | C.52° | D.76° |
更新时间:2021-12-28 09:17:47
|
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【推荐1】下列命题中,是真命题的是( )
A.![]() |
B.相等的圆周角所对的弧相等 |
C.通过大量重复试验,可以用频率估计概率 |
D.在![]() ![]() ![]() |
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【推荐2】如图,点A、B、C在⊙O上,BC
OA,连接BO并延长,交⊙O于点D,连接AC,DC.若∠A=25°,则∠D的大小为( )
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A.25° | B.30° | C.40° | D.50° |
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名校
【推荐1】如图,在直径为2的
中,延长直径
至点C,使
是
的切线,D为切点,则
的长是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/9/e6bdfff7-f9dd-49bc-b014-7d14f6ebea21.png?resizew=199)
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【推荐2】如图,在△ABC中,∠ACB=90°,AC=4,BC=3,P是AC上的一点,PH⊥AB于点H,以PH为直径作⊙O,当CH与PB的交点落在⊙O上时,AP的值为( )
![](https://img.xkw.com/dksih/QBM/2020/1/18/2379564865036288/2379948302868480/STEM/009cc8fbbbbe4165a39564247b0c9daf.png?resizew=135)
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【推荐1】如图,
与
相切于点
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的度数为( ).
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【推荐2】如图,
是圆
的直径,
与圆
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与圆
交于
,连接
,若
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( )
![](https://img.xkw.com/dksih/QBM/2021/8/30/2797175374020608/2798952457355264/STEM/1dce3a34-70d8-4a0a-9c32-67d717f91e8d.png)
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