下列命题中的真命题是( )
A.锐角大于它的余角 | B.三角形的一个外角等于它的两个内角之和 |
C.钝角大于它的补角 | D.锐角与钝角之和等于平角 |
更新时间:2023-07-02 21:17:16
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真题
【推荐1】如图,直角三角板的直角顶点落在矩形纸片的一边上.若
,则
的度数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fb5d679cc531c723215173816a8ec54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】下列说法中正确的有( )
(1)两条直线被第三条直线所截,同位角相等;
(2)若
,则
,
,
互余;
(3)相等的两个角是对顶角;
(4)从直线外一点到这条直线的垂线段,叫做这点到直线的距离.
(1)两条直线被第三条直线所截,同位角相等;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7024159619880bb35771521157410c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4843207711bdb336b71f81c09258717c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/651765d16c8f6415d7dc63ff6f0da6fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9917ac3426d3ac941bf789687914da4.png)
(3)相等的两个角是对顶角;
(4)从直线外一点到这条直线的垂线段,叫做这点到直线的距离.
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】下列说法不正确的是( )
①
的系数是1,次数是3;②平角是一条直线;③多项式
是二次三项式;④射线
与射线
是同一条射线;⑤一个角的补角不是锐角就是钝角.
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ad1e35174974b3420e9b3c6bbff0e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fffd8e94e550277001f953126f2fe57b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d567bdeba9b8e17d0911f594e141eed.png)
A.①②④⑤ | B.②④⑤ | C.②③④ | D.①③⑤ |
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【推荐2】给出下到说法:①若
与
互为补角,则
与
中必有一个是钝角;②若
,则
,
,
互为补角;③大于直角的角称为钝角;④一个角的余角一定大于这个角,其中,正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15417741fba20d681ab4414b07339099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15417741fba20d681ab4414b07339099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7af52e018d52dbca3902b7e17722cc2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780d8fd6c6c1deeeb45e15f639719e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15417741fba20d681ab4414b07339099.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85f128dbb8081cbf2e0800306f771842.png)
A.0个 | B.1个 | C.2个 | D.3个 |
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【推荐1】如图,在
中,
平分
,若
,则
的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/27/1f8450d0-b857-4e28-acfd-75671da89455.png?resizew=148)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/601a4746ba1cb47f53d59e0a5da61b4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/27/1f8450d0-b857-4e28-acfd-75671da89455.png?resizew=148)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,已知
是等边三角形,点B,C,D,E在同一直线上,且
,
,则
( )
![](https://img.xkw.com/dksih/QBM/2021/11/11/2848907620270080/2916973101768704/STEM/84ee0b05-5194-4894-bc76-b676bb505263.png?resizew=160)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7990cc55289f09c4e67860bb64bb2b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cb27447c815a8a495ba5bf7040e265d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b83764876be47a196fd5f408763738a.png)
![](https://img.xkw.com/dksih/QBM/2021/11/11/2848907620270080/2916973101768704/STEM/84ee0b05-5194-4894-bc76-b676bb505263.png?resizew=160)
A.30° | B.20° | C.15° | D.10° |
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【推荐1】有下列命题:①两点之间,线段最短;②相等的角是对顶角;③有两个角相等的三角形是等腰三角形.④如果
,那么
.其中真命题的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/642bd5f18b601dde5d0576ab9a663b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a9d8a8bb80447edc0541c9e7828f6e.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】下列命题中,真命题为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efdf0602ff47fdba07ff4066fdb96fb0.png)
任意三点确定一个圆;
平分弦的直径垂直于弦;
的圆周角所对的弦是直径;
同弧或等弧所对的圆周角相等.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efdf0602ff47fdba07ff4066fdb96fb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c512c047783c07da1d4f4455a4033ef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876959b9f90f2379cf3d0927a8e31005.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4d99b74e6e14d5728a59130b4aea4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74269cfb503e736149e1ac3165fcbafa.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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