如图,在
中,
,
,
于D,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c5840e0454fdec7d2158072c43b8db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3702b5620dbee356a8e560c78d223ad.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2024-05-10 17:12:32
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【推荐1】如图,
为
的切线,切点为
,
交
于点
为
上一点,若
则
的度数为( )
![](https://img.xkw.com/dksih/QBM/2020/11/26/2605320029462528/2609206633373696/STEM/9c321726-a216-46c2-9bef-faa6d2b22351.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d240ea67c239b0d9213448c11cba18c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a663e9886a5e5445e68eb22e131622c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://img.xkw.com/dksih/QBM/2020/11/26/2605320029462528/2609206633373696/STEM/9c321726-a216-46c2-9bef-faa6d2b22351.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】下列条件中,能判定△ABC为直角三角形的是( )
A.∠A=2∠B=3∠C | B.∠A+∠B=2∠C |
C.∠A=∠B=30° | D.∠A=![]() ![]() |
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【推荐1】等腰三角形的周长为11,其中一边长为3,则该等腰三角形的底边长为( )
A.3 | B.5 | C.4或5 | D.3或5 |
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【推荐2】已知一个等腰三角形两边长分别为5,6,则它的周长为( )
A.16 | B.17 | C.16 或 17 | D.10 或 12 |
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