下列命题为真命题的是( )
A.三角形的一个外角大于任何一个和它不相邻的内角 |
B.如果两条直线不平行,那么这两条直线必定相交 |
C.如果两个角的两边分别平行,那么这两个角相等 |
D.过一点有且只有一条直线与这条直线平行 |
更新时间:2023-07-22 14:07:37
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【推荐1】下列说法正确的是( )
A.如果两个角的和是![]() |
B.相等的角是对顶角 |
C.过一点有且只有一条直线与已知直线平行 |
D.同角或等角的余角相等 |
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【推荐2】下列说法正确的是( )
A.![]() ![]() ![]() ![]() ![]() ![]() ![]() |
B.![]() ![]() ![]() ![]() ![]() ![]() |
C.![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
D.![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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【推荐1】如图,已知AB∥CD,则∠A、∠E、∠D之间的数量关系为( )
![](https://img.xkw.com/dksih/QBM/2017/3/17/1645661708427264/1654384866263040/STEM/a2ee901f15b04595bc0bcf4c57abeaa4.png?resizew=167)
![](https://img.xkw.com/dksih/QBM/2017/3/17/1645661708427264/1654384866263040/STEM/a2ee901f15b04595bc0bcf4c57abeaa4.png?resizew=167)
A.∠A+∠E+∠D=360° | B.∠A+∠E+∠D=180° | C.∠A+∠E﹣∠D=180° | D.∠A﹣∠E﹣∠D=90° |
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【推荐2】如图,
中,
与
的平分线交于点
,过点
作
交
于点
,交
于点
,那么下列结论:
①
是等腰三角形;②
;
③若
,
;④
.
其中正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/28/235d92b6-e50c-400d-ab9c-1e80cc738482.png?resizew=125)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e210c9698063925ad2df6b6c1749571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8129a90e6874cdc7c23ca4784aa9da8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb773a664fa72fc5d8fe377e9f891901.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d777d15cd733338ecfd0ea63819f62c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80a3fcea29aa3fb964ca0fa1d66f6f06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cf5b86308e9f777a6611503ba8d0e9e.png)
其中正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/28/235d92b6-e50c-400d-ab9c-1e80cc738482.png?resizew=125)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
【推荐1】在
中,
,
,点D在边
上,
,点E、F在线段
上,
,若
的面积为18,则
与
的面积之和为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/5034e480-cf55-4125-92b6-a91668a7a0e6.png?resizew=111)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2da1d50433aecf541991fd0f01773cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8cabcef1cee1213140371c499339864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feb8772571a04e4eb48f7772592d18a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15514bc735fe4b744672edefe00009c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/1/5034e480-cf55-4125-92b6-a91668a7a0e6.png?resizew=111)
A.6 | B.9 | C.12 | D.16 |
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【推荐2】如图,将三角尺的直角顶点放在直尺的一边上,
,
,则
的度数等于( )
![](https://img.xkw.com/dksih/QBM/2023/1/8/3148282664386560/3149075309051904/STEM/d71515bba54a49619c28ee7b7d094926.png?resizew=88)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e54ccc7d2f8af35a252977d6e2af4663.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4335b495123a65115e8455adac398f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/605f2976297a0deaa1602ef09d6a5afa.png)
![](https://img.xkw.com/dksih/QBM/2023/1/8/3148282664386560/3149075309051904/STEM/d71515bba54a49619c28ee7b7d094926.png?resizew=88)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】下列命题:①如果一个数的相反数等于它本身,则这个数是0;②在三角形中,连接一个顶点和对边中点直线叫做三角形的中线;③任何三角形都有三条中线、三条内角平分线、三条高线,它们都相交于一点;④直角三角形的高只有一条.⑤三角形的三条高所在的直线相交于一点,这一点不在三角形的内部,就在三角形的外部;⑥一个数的算术平方根等于它本身,则这个数是1或0;其中真命题有( ).
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】下列命题是真命题的是( )
A.对顶角相等 | B.内错角相等 | C.邻补角相等 | D.余角相等 |
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