1 . 下列命题中:①对顶角相等;②同位角相等;③两个锐角的和是钝角;④在同一平面内,垂直于同一条直线的两条直线平行.是真命题的是__________ .(填序号)
您最近一年使用:0次
2 . 下列关于平行线的说法正确的是( )
①过一点有且只有一条直线与已知直线平行;
②同位角相等;
③同旁内角互补,两直线平行;
④垂直于同一条直线的两条直线互相平行.
①过一点有且只有一条直线与已知直线平行;
②同位角相等;
③同旁内角互补,两直线平行;
④垂直于同一条直线的两条直线互相平行.
A.③ | B.①③ | C.②③ | D.①③④ |
您最近一年使用:0次
3 . 已知
,
,点
为边
上一点.
,使得
交
于点
;(要求:用直尺和圆规作图,保留作图痕迹,不写作法及证明,必须作答)
(2)在(1)的条件下,连接
,若
平分
,且
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.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/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c0aa4c793921fdaa5d430cb90d78ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)在(1)的条件下,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba42008388ee02bfaf08822d034a1f58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
您最近一年使用:0次
4 . 请把下面证明过程补充完整.
,
,
.
求证:
.
证明:∵
,
(______________),
∴
(______________).
∴________
________(__________________________________).
∴
(______________________________).
又∵
(已知),
∴____________(等量代换).
∴
(________________________________).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc90fee532e50d319081d571410421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0d2b4784ca73e0478d3ae08fd494a8f.png)
证明:∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc90fee532e50d319081d571410421.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c613c8ea8b1abe76b803ae12316a8f9.png)
∴________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16acdcaac54dcfe8cc11accda9363987.png)
又∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
∴____________(等量代换).
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0d2b4784ca73e0478d3ae08fd494a8f.png)
您最近一年使用:0次
5 . 有下列说法:①任何数的零次幂都等于1;②两条直线被第三条直线所截,同位角相等;③在同一平面内,垂直于同一条直线的两条直线平行;④全等三角形的周长相等;⑤面积相等的两个三角形全等.其中正确的有( )个.
A.2 | B.3 | C.4 | D.5 |
您最近一年使用:0次
6 . 如图
交
于点
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2a8bf5e05a07c93a7104839fc21849.png)
_______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9089407e64598ba1f97e6a9d4ccc72c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/363531d8de03597d8414205dfdc7a354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2a8bf5e05a07c93a7104839fc21849.png)
您最近一年使用:0次
7日内更新
|
48次组卷
|
2卷引用:甘肃省武威市凉州区武威第十一中学教研联片期中考试2023-2024学年七年级下学期5月期中数学试题
7 . 下列命题中,真命题是( )
A.如果![]() ![]() | B.两条直线被第三条直线所裁,同位角相等 |
C.单项式![]() ![]() | D.三角形的一个外角大于任何一个内角 |
您最近一年使用:0次
8 . 如图,直线
与
被直线
所截,交点分别为M、N.已知
,求证:
.
![](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/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5911fe2dc8c6ecdccc5000610e002be9.png)
您最近一年使用:0次
9 . 下列命题中,是真命题的是( )
A.同位角相等 |
B.在同一平面内,垂直于同一条直线的两条直线平行 |
C.相等的角是对顶角 |
D.若![]() ![]() |
您最近一年使用:0次
10 . 如图,在
中,点
、
分别在
、
上,且
,
,
,求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca14fa885a9d04f04e0418b49b118241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e37adea48c840207160c22f2b1ebc937.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70b3c19f960629fb9cb5c4e1b3cecf00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
您最近一年使用:0次