如图,已知∠1=∠2,∠3=105°,则∠4的度数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/2/807d6721-ae4d-4575-bd33-a5dcc221ad1f.png?resizew=170)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/2/807d6721-ae4d-4575-bd33-a5dcc221ad1f.png?resizew=170)
A.60° | B.75° | C.80° | D.105° |
更新时间:2022-04-14 01:27:42
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【知识点】 根据平行线判定与性质求角度解读
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【推荐1】如图,直线
∥
,∠1=20°,则∠2+∠3是( )
![](https://img.xkw.com/dksih/QBM/2022/4/10/2955011937099776/3064719724920832/STEM/79b7be71cc114baf9040c1f79eb5e5ac.png?resizew=163)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d27c081879b6c6bc0abb0ceedb9d3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e5c154445ca71ee9d4fb29a98b8965d.png)
![](https://img.xkw.com/dksih/QBM/2022/4/10/2955011937099776/3064719724920832/STEM/79b7be71cc114baf9040c1f79eb5e5ac.png?resizew=163)
A.180° | B.200° | C.220° | D.7° |
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【推荐2】将一副三角板按如图放置,则下列结论:①如果∠2=30°,则有AC
DE;②∠BAE+∠CAD=180°;③如果BC
AD,则有∠2=45°;④如果∠CAD=150°,必有∠4=∠C,其中正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
A.①②③ | B.①②④ | C.①③④ | D.①②③④ |
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