下列命题中,是真命题是( )
A.相等的两个角是对顶角 | B.两直线平行,同旁内角相等 |
C.过一点有且只有一条直线与已知直线平行 | D.在同一平面内,过一点有且只有一条直线与已知直线垂直 |
更新时间:2022-08-10 18:05:38
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【推荐1】如图,直线
与
相交于点
,
,
,则
的度数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a4a26b9ab8f36629aee288b6a0fc77c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/551137582e6b5534016fe384b492b13e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7307ac7510cf35f74337d368b94da4e5.png)
A.30° | B.35° | C.40° | D.45° |
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【推荐2】如图,
,
相交于点
,
,射线
平分
,下列结论中错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/6bae2ba1-48b5-4c26-aeea-caed2bab6000.png?resizew=174)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a4a26b9ab8f36629aee288b6a0fc77c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9f91270ddbe1cf3c1362e1b95aee14.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/6bae2ba1-48b5-4c26-aeea-caed2bab6000.png?resizew=174)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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【推荐1】如图,直线AB、CD相交于点O,且∠AOC+∠BOD=120°,则∠AOD的度数为( )
![](https://img.xkw.com/dksih/QBM/2018/2/6/1876504050065408/1877997592387584/STEM/dd2c1496-07a7-40bf-a522-eb1bdd2211f8.png)
![](https://img.xkw.com/dksih/QBM/2018/2/6/1876504050065408/1877997592387584/STEM/dd2c1496-07a7-40bf-a522-eb1bdd2211f8.png)
A.130° | B.120° | C.110° | D.100° |
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【推荐2】下面四个命题:①对顶角相等;②同旁内角互补,两直线平行;③全等三角形的对应角相等;④如果两个实数的平方相等,那么这两个实数相等,其中逆命题是真命题的个数是( )
A.1 | B.2 | C.3 | D.4 |
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【推荐1】下列说法正确的个数是( ).
(1)无理数不能在数轴上表示
(2)两条直线被第三条直线所截,那么内错角相等
(3)经过一点有且只有一条直线与已知直线平行
(4)两点之间线段最短
(1)无理数不能在数轴上表示
(2)两条直线被第三条直线所截,那么内错角相等
(3)经过一点有且只有一条直线与已知直线平行
(4)两点之间线段最短
A.0个 | B.1个 | C.2个 | D.3个 |
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【推荐2】下列说法中,正确的个数是( )
(1)对顶角相等;
(2)内错角相等;
(3)经过一点有且只有一条直线与已知直线平行;
(4)如果两条直线都与第三条直线平行,那么这两条直线也互相平行;
(5)与线段
垂直的直线可以有无数条,但垂直平分线段
的直线有且只有1条;
(6)联结直线外一点与直线上各点的所有线段中,垂线段最短.
(1)对顶角相等;
(2)内错角相等;
(3)经过一点有且只有一条直线与已知直线平行;
(4)如果两条直线都与第三条直线平行,那么这两条直线也互相平行;
(5)与线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(6)联结直线外一点与直线上各点的所有线段中,垂线段最短.
A.3 | B.4 | C.5 | D.6 |
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【推荐1】如图,
,
,
,
分别平分
的内角
,外角
,外角
.以下结论:①
;②
;③
;④
和
都是等腰三角形.其中正确的结论有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b77c8ef75793d21d2d5d8bf470a61159.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/752fa646a2d9cfca34001748445301c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6344778ed1e75c1a99e2268468081867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecd91616f871c5228451932b58285bb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/032cef5a5208f7b60cc887814292b8ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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【推荐2】如图,
,
的平分线交
于点B,G是
上的一点,
的平分线交
于点D,且
.下列结论:①
;②与
互余的角有2个;③
平分
;④若
,则
.其中正确结论的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d527b7de54224cc1698843a59a19a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/752fa646a2d9cfca34001748445301c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6a14654f44613e7dc85413f173e5cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4d5ff57f147aa0628fdd47899b5a132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9df5466383bedd9dd915a8788547d730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/685516a27697104e83b311d76efa17aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06e322e0c87479bba874db9ae9ba36b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76bc8e50eeccced1d7f3bc52e09a7d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd465973943bcd766b5275ee204bbf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c3d30718ceaef9243c9964748e325ab.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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