某等腰三角形的顶角是80°,则一腰上的高与底边所成的角的度数( )
A.40° | B.60° | C.80° | D.100° |
更新时间:2016-12-06 14:10:46
|
【知识点】 根据等边对等角求角度解读
相似题推荐
单选题
|
较易
(0.85)
【推荐1】如图,把
绕着点
逆时针旋转100°,得到
,若点
恰好在
的延长线上,则
的度数是( )
![](https://img.xkw.com/dksih/QBM/2022/7/7/3017558050463744/3043142465691648/STEM/18b43da4ae9446b29db868d63eb797e3.png?resizew=162)
![](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/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://img.xkw.com/dksih/QBM/2022/7/7/3017558050463744/3043142465691648/STEM/18b43da4ae9446b29db868d63eb797e3.png?resizew=162)
A.90° | B.80° | C.70° | D.75° |
您最近一年使用:0次
单选题
|
较易
(0.85)
【推荐2】如图,AB是⊙O的直径,C,D是⊙O上两点,AD=CD,过点C作⊙O的切线交AB的延长线于点E,若∠E=50°,则∠ACD等于( )
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898595756662784/2899838072791040/STEM/b9edcb0331734bd9bd46940486eec7ee.png?resizew=200)
![](https://img.xkw.com/dksih/QBM/2022/1/20/2898595756662784/2899838072791040/STEM/b9edcb0331734bd9bd46940486eec7ee.png?resizew=200)
A.40° | B.50° | C.55° | D.60° |
您最近一年使用:0次