如图,在
中,
,将
绕点
按逆时针方向旋转一个锐角
到
的位置,连接
,若
,则旋转角
的度数为( )
![](https://img.xkw.com/dksih/QBM/2020/5/14/2462628446568448/2463441014145024/STEM/4cde7c9c1b3c4bb88d750b873dc350d4.png?resizew=184)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7823487ac75827c51afa4e4ebaac6411.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80b5cf411c2fea8bc9f4a5fb497515a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ecac2dad4cffdd971fd23deacff3fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae69c06a9d6792ce374399ed86d285b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/2020/5/14/2462628446568448/2463441014145024/STEM/4cde7c9c1b3c4bb88d750b873dc350d4.png?resizew=184)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2020-05-15 21:06:29
|
相似题推荐
单选题
|
适中
(0.65)
【推荐1】如图,在
中,
,若点D为BC的中点,过点D作
,分别交AB,AC于点M,N,连接MN,则下列结论中:①
是等腰直角三角形;②
的周长有最小值;③四边形AMDN的面积为定值8;④
的面积有最小值;⑤
的面积有最大值.正确的有( )
![](https://img.xkw.com/dksih/QBM/2022/11/1/3100374074359808/3100455743496192/STEM/7be642570851434db956b85281b5780b.png?resizew=195)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44e301688afe5bf58133123fc41108fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6405c61d4c45c746edd730be19c0dfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/999c42a021bdc576f097246b9e64d986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/999c42a021bdc576f097246b9e64d986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/999c42a021bdc576f097246b9e64d986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://img.xkw.com/dksih/QBM/2022/11/1/3100374074359808/3100455743496192/STEM/7be642570851434db956b85281b5780b.png?resizew=195)
A.5个 | B.4个 | C.3个 | D.2个 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】如图,在等腰直角三角形
中,
,将
沿
方向平移得到
,若
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ee6e1d480ece7117e1f87ebf4bbeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1a4cd8610ebbc22728db7f30ceb5543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8286299e82c82bfe764b2fced9319110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aab04d7b9e668cbf9bd2b3ffcdaca42.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐1】如图,将
绕点
顺时针方向旋转
得到
,若
,连接
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d36581140ebac5d28438ea63b1b23b65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b757706eee506a078fc25e3f33a70cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dc2d2dd56fcc67698c45a6e0e48f80.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/5/94d5a6bc-06e2-473c-aba6-228b8712f356.png?resizew=204)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】如下图,等边
的边长为2,
在直线l上绕其右下角的顶点C顺时针旋转
至图①位置,再绕右下角的顶点继续顺时针旋转
至图②位置,
,以此类推,这样连续旋转9次后,顶点A在整个旋转过程中所经过的路程之和是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c0927afc571a7c966c98192040979e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次