将一副三角板按如图放置,则下列结论①
;②如果
则有
;③如果
,则有
;④如果
,必有
,其中正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e50ce9ef89a466df68124a1dccff5663.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615c891c931323fc44eae27d03cd0bce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95cc39bd5f811ee710c8a9fb73d57791.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615c891c931323fc44eae27d03cd0bce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a755edadca4e4fc27fd49559b8d691ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615c891c931323fc44eae27d03cd0bce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ca775b81195fffe5bcb3ae613e5f3d.png)
A.①② | B.①②④ | C.③④ | D.①②③④ |
更新时间:2023-08-08 20:19:29
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【推荐1】如图,在平面直角坐标系中,将一块含有
角的直角三角板按如图所示的方式放置,直角顶点C的坐标为(2,0),顶点A的坐标为(0,4),顶点B恰好落在第一象限内,反比例函数
的图像经过点B,则k的值为( )
![](https://img.xkw.com/dksih/QBM/2022/7/20/3026818161123328/3067600340713472/STEM/f626224a2be44f4f9e1ba21c30bd5f75.png?resizew=194)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://img.xkw.com/dksih/QBM/2022/7/20/3026818161123328/3067600340713472/STEM/f626224a2be44f4f9e1ba21c30bd5f75.png?resizew=194)
A.4 | B.6 | C.8 | D.12 |
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【推荐2】如图所示,将一副三角板按如图放置,有下列结论:①
;②如果
,则有
;③如果
,则有
;④如果
,必有
.其中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e50ce9ef89a466df68124a1dccff5663.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615c891c931323fc44eae27d03cd0bce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43defd54316aac92a3d18d4d400033c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e54ccc7d2f8af35a252977d6e2af4663.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9874eca4abea481fa84eb772a920f9c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c9c14d7ac0501707e8d6eb48a956faa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d730ae4307db56b47849c3a19dedfb3f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/22/5218537e-5617-41bc-899e-7180763d57e1.png?resizew=334)
A.①② | B.①③ | C.①②③ | D.①②④ |
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【推荐1】如图,下列能判定
的条件有( )个
(1)∠1=∠2;(2)∠3=∠4;(3)∠B=∠5;(4)∠B+∠BCD=180°;(5)∠5=∠D
![](https://img.xkw.com/dksih/QBM/2020/10/9/2567276893528064/2567484493438977/STEM/662b60c17f6a499f92fc792328325eb6.png?resizew=171)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
(1)∠1=∠2;(2)∠3=∠4;(3)∠B=∠5;(4)∠B+∠BCD=180°;(5)∠5=∠D
![](https://img.xkw.com/dksih/QBM/2020/10/9/2567276893528064/2567484493438977/STEM/662b60c17f6a499f92fc792328325eb6.png?resizew=171)
A.1 | B.2 | C.3 | D.4 |
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【推荐2】下面给出的结论中,说法正确的有( )
①最大的负整数是﹣1;②在同一个平面内,经过一个已知点只能画一条直线和已知直线垂直;③当a≤0时,|a|=﹣a;④若a2=9,则a一定等于3;⑤邻补角的两条角平分线构成一个直角;⑥同旁内角相等,两直线平行.
①最大的负整数是﹣1;②在同一个平面内,经过一个已知点只能画一条直线和已知直线垂直;③当a≤0时,|a|=﹣a;④若a2=9,则a一定等于3;⑤邻补角的两条角平分线构成一个直角;⑥同旁内角相等,两直线平行.
A.2个 | B.3个 | C.4个 | D.5个 |
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【推荐1】如图,
是
中
边上一点,
,若
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f3844363acad4b97e3d4dc93a6ab74b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a5999deec5c14ab410f80418181911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b69d40b75d582c4b8ffa2369af1d41.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/30/62a31c3f-f8a0-454b-9bbf-e6f1358c1bdc.jpg?resizew=133)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,直线
,
是等边三角形,顶点B在直线n上,直线m交
于点E,交
于点F,若
,则
的度数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0205571fa39f343ee5749b78d466bf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dce3b5e3f9d0e5300083b8e60543319.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,在△ABC中,按以下步骤作图:①分别以点A和点C为圆心,以大于
AC的长为半径作弧,两弧相交于M、N两点;②作直线MN交BC于点D,连接AD.若AB=BD,AB=4,∠C=30°,则△ACD的面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/18/eec559a0-79a9-4b14-b004-b34b8647b1e6.png?resizew=181)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/18/eec559a0-79a9-4b14-b004-b34b8647b1e6.png?resizew=181)
A.![]() | B.![]() | C.![]() | D.13 |
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【推荐2】如图,在△ABC中,点D在BC边上,∠ADB=∠BAC=120°,AC=2AB,AD=4,则DC的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/b4a6cca8-56c5-456b-8b04-1b7bffc7a56a.png?resizew=192)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/b4a6cca8-56c5-456b-8b04-1b7bffc7a56a.png?resizew=192)
A.![]() | B.8 | C.![]() | D.12 |
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