将一副三角板按图示进行摆放,其中
的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/e6deeb71-0896-4a7f-9a1f-564f77268fad.png?resizew=741)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffa3205b1df826d63914dcb55bb3ab43.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/e6deeb71-0896-4a7f-9a1f-564f77268fad.png?resizew=741)
A.①②③ | B.①②④ | C.①③④ | D.②③④ |
更新时间:2024-01-19 09:19:18
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【推荐1】如图,一块三角板
,
,点C,点B分别落在直尺的两条平行边上,
,则
的度数为()
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/9c677b13-34b0-4fc4-9127-fa07b4d155bd.png?resizew=213)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59391ad0a68d994843e15600f74a280e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/25/9c677b13-34b0-4fc4-9127-fa07b4d155bd.png?resizew=213)
A.50° | B.60° | C.70° | D.80° |
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【推荐2】如图,l1∥l2,将一副直角三角板作如下摆放,图中点A、B、C在同一直线上,∠1=80°,则∠2的度数为( )
A.100° | B.120° | C.130° | D.150° |
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【推荐1】下列说法中,正确的是( )
①若
,则
的余角是
;②若
,则
和
互为补角;③一个角的补角一定是锐角;④若
,则点
在线段
上.
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1bc2047d160636aab21e0f7fe9483a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f499dafff1e395152396f8035aafd88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb303643bf116abd0f4be2c4bb943a20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/682627cc16a6e64bfaa5386f2dca8774.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
A.①② | B.①④ | C.①②③ | D.②③④ |
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【推荐2】下列说法正确的是( )
A.2不是单项式 | B.射线![]() ![]() |
C.锐角的补角比它的余角大![]() | D.3.657精确到十分位是3.66 |
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