如图,将一副三角板的直角顶点重合,且使
,则
的度数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/1/6cd59845-8477-40d4-acd2-d5be6488d471.png?resizew=195)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6beda2518cf76da94d7ec9a813dcfa82.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/1/6cd59845-8477-40d4-acd2-d5be6488d471.png?resizew=195)
A.![]() | B.![]() | C.![]() | D.![]() |
21-22七年级下·河北唐山·期末 查看更多[2]
更新时间:2022-07-30 09:40:47
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【推荐1】将一块三角板和一把直尺如图放置,若
,则
的度数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f586d178cb0f69dd900967766ba8950a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/5/0a3b3ebd-e1e2-4598-9792-9f83e2020dab.png?resizew=269)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】一把直尺和一块含30°角的直角三角板ABC如图所示摆放,直尺一边与三角板的两直角边分别交于点D和点E,另一边与三角板的两直角边分别交于点F和点A,且∠CED=35°,那么∠BAF的大小为( )
![](https://img.xkw.com/dksih/QBM/2020/8/18/2530294686941184/2530679942111232/STEM/e80e3ed9b1d746eaa40e44b8312a8d16.png?resizew=209)
![](https://img.xkw.com/dksih/QBM/2020/8/18/2530294686941184/2530679942111232/STEM/e80e3ed9b1d746eaa40e44b8312a8d16.png?resizew=209)
A.5° | B.15° | C.25° | D.35° |
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【推荐1】如图,已知直线AB,CD被直线AC所截,AB∥CD,E是平面内CD上方的一点(点E不在直线AB,CD,AC上),设∠BAE=
,∠DCE=
.下列各式:①
+
,②
﹣
,③
﹣
,④180°﹣
﹣
,⑤360°﹣
﹣
中,∠AEC的度数可能是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/0f6aa593-326d-4e31-af0c-2689f9284543.png?resizew=150)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/0f6aa593-326d-4e31-af0c-2689f9284543.png?resizew=150)
A.①②③ | B.①②④⑤ | C.①②③⑤ | D.①②③④⑤ |
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【推荐2】如图,由AC∥ED,可知相等的角有( )
![](https://img.xkw.com/dksih/QBM/2018/2/28/1891972815044608/1897595952472064/STEM/2845c0153943496eb6f4eae76cbee80c.png?resizew=138)
![](https://img.xkw.com/dksih/QBM/2018/2/28/1891972815044608/1897595952472064/STEM/2845c0153943496eb6f4eae76cbee80c.png?resizew=138)
A.6对 | B.5对 | C.4对 | D.3对 |
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【推荐1】如图,△ABC中,BA=BC,DE是边AB的垂直平分线,分别交BC、AB于点D、E,连接AD,若AD恰好为∠BAC的平分线,则∠B的度数是( )
![](https://img.xkw.com/dksih/QBM/2021/7/30/2775130528325632/2775417325756416/STEM/371dee718beb46ddbeadd9b12e8846a4.png?resizew=195)
![](https://img.xkw.com/dksih/QBM/2021/7/30/2775130528325632/2775417325756416/STEM/371dee718beb46ddbeadd9b12e8846a4.png?resizew=195)
A.60° | B.45° | C.36° | D.30° |
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【推荐2】在△ABC中,6∠A=3∠B=2∠C,则△ABC是( )
A.锐角三角形 | B.直角三角形 | C.钝角三角形 | D.无法确定 |
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