如图,在已知的△ABC中,按以下步骤作图:①分别以B,C为圆心,以大于
BC的长为半径作弧,两弧相交于两点M,N;②作直线MN交AB于点D,连接CD.若CD=AC,∠B=250,则∠ACB的度数为( )
![](https://img.xkw.com/dksih/QBM/2019/9/29/2301207834673152/2303289044107264/STEM/8c2cc80504624e498f66fe917d33e4d2.png?resizew=196)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/2019/9/29/2301207834673152/2303289044107264/STEM/8c2cc80504624e498f66fe917d33e4d2.png?resizew=196)
A.105° | B.110° | C.115° | D.120° |
更新时间:2019-11-06 19:32:40
|
【知识点】 根据等边对等角求角度解读
相似题推荐
单选题
|
适中
(0.65)
名校
【推荐1】如图,BM是△ABC的角平分线,D是BC边上的一点,连接AD,使AD=DC,且∠BAD=120°,则∠AMB=( )
![](https://img.xkw.com/dksih/QBM/2018/12/19/2100121575563264/2101746973032448/STEM/e2b28fbaea5f4b54851352e8d7b6e711.png?resizew=237)
![](https://img.xkw.com/dksih/QBM/2018/12/19/2100121575563264/2101746973032448/STEM/e2b28fbaea5f4b54851352e8d7b6e711.png?resizew=237)
A.30° | B.25° | C.22.5° | D.20° |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐2】如图,在
中,
是
边上一点,
,
,则
的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/2462086e-6506-4e12-84a3-6bb541398117.png?resizew=159)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdf289a27a4dd298314e71212addff6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae54a216ed6a5bc56af1f501426ca438.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/2462086e-6506-4e12-84a3-6bb541398117.png?resizew=159)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次