已知三角形纸片
,其中
,将这个角剪去后得到四边形
,则这个四边形的两个内角
与
的和等于( )
![](https://img.xkw.com/dksih/QBM/2020/5/21/2467567627100160/2468324844085248/STEM/e559c39eefb647369f912ef6da1dd0db.png?resizew=137)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7099026716ee1821dd7d9f157dc055f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58e65831c1e6103af4c0bb4a4a61b964.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dc2d2dd56fcc67698c45a6e0e48f80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a71e8a816d9ef65d4bffd81fd53216.png)
![](https://img.xkw.com/dksih/QBM/2020/5/21/2467567627100160/2468324844085248/STEM/e559c39eefb647369f912ef6da1dd0db.png?resizew=137)
A.235° | B.225° | C.215° | D.135° |
更新时间:2020-05-27 22:12:52
|
【知识点】 三角形内角和定理的应用解读
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【推荐1】如图,直线AB∥CD,∠ B=50°,∠C=40°,则∠E等于( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/10/ad8b35ce-24e4-459d-9646-8eea57f1ecb2.png?resizew=145)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/10/ad8b35ce-24e4-459d-9646-8eea57f1ecb2.png?resizew=145)
A.70° | B.80° | C.90° | D.100° |
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【推荐2】如图,点E在
的边
上,点A在
内部,
,
,
.给出下列结论:①
;②
;③
;④
.其中正确的是( )
![](https://img.xkw.com/dksih/QBM/2022/12/15/3131398942040064/3158950692093952/STEM/cfa03182bf374215bcc84bed6385b9bf.png?resizew=132)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0005e1ef60f6ddc5f9a83e3de1ef3b2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0005e1ef60f6ddc5f9a83e3de1ef3b2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dc3d38eece4c30e57c101683cf18578.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdf91f9fc77ad15f479fc465bb3c73b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/509d8dd6031dc0ef92075877e53fe201.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88d0ee704c942b221c75333afeca0e0c.png)
![](https://img.xkw.com/dksih/QBM/2022/12/15/3131398942040064/3158950692093952/STEM/cfa03182bf374215bcc84bed6385b9bf.png?resizew=132)
A.①③ | B.①②③ | C.②③④ | D.①②③④ |
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