1 . 如图,已知
,
,所以
,
,
三点共线,其理由是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae781496bb5bc79b67abced9aa3cd0c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa145a3e4f18f784ddf4869e0bf904c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.两点确定一条直线 |
B.在同一平面内,经过一点有且只有一条直线与已知直线垂直 |
C.过已知直线上一点作该直线的垂线只能作一条 |
D.线段最短 |
您最近一年使用:0次
2024-06-03更新
|
90次组卷
|
3卷引用:第5章 易错疑难集训一
名校
2 . 如图,
的同位角有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/4/b2c95cc4-3916-4fa5-8b85-6ca29559c19e.png?resizew=172)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b69d40b75d582c4b8ffa2369af1d41.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/4/b2c95cc4-3916-4fa5-8b85-6ca29559c19e.png?resizew=172)
A.![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() ![]() |
您最近一年使用:0次
2024-05-12更新
|
138次组卷
|
3卷引用:第5章 易错疑难集训一
24-25八年级上·全国·课后作业
3 . 求x的值:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a8cb9e5b695564797c7fdaa58f7e9a8.png)
您最近一年使用:0次
24-25八年级上·全国·课后作业
4 . 如图,在正方形网格中,网格线的交点称为格点.已知A、B是网格中的两个格点,如果C也是网格中的格点,且使
为等腰三角形,那么符合条件的点C有______ 个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
24-25八年级上·全国·课后作业
5 . 在
中,
,
,直线MN经过点C,且
于点D,
于点E.
绕点C旋转到图①的位置时,求证:
;
(2)当直线
绕点C旋转到图②的位置时,写出线段
和
的数量关系,并说明理由;
(3)当直线
绕点C旋转到图③的位置时,写出
和
的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7920d2550a6af7df3db60a33fe02c53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53d9b83f3c224fc8e10a46ab71530c2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89dc287e73e249f4c807420b826624ae.png)
(2)当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92cd9d844abea1d9adab5bcc4a75197f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
(3)当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92cd9d844abea1d9adab5bcc4a75197f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
您最近一年使用:0次
24-25八年级上·全国·课后作业
6 . 计算:
(1)
;
(2)
;
(3)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f914d0afeb689fad2f01f7a836bc4bf.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0dfb9a9ee2ac4b55ecc33d3fc338935.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547e0488712804f23c7f7556ab58d193.png)
您最近一年使用:0次
24-25八年级上·全国·课后作业
7 . 已知
中,
,
,
边上的高
.求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9216b91b1a0b2677c97e9f79ece2144.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addb8e20db1fbb40f17dea52f951b907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ee826937d2add7a93aaa1422f8b736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
24-25九年级上·全国·课后作业
8 . 如图,圆周角
.若连接
,则
过圆心O吗?为什么?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
您最近一年使用:0次
24-25九年级上·全国·课后作业
9 . 如图,
是
的直径,
是
的弦,
,
.在图中作弦
,使
,并求
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab926d89b65f26c12e3da73ef1e5cf68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5157b42da58d55daad27d98b2fec15ff.png)
您最近一年使用:0次
24-25九年级上·全国·课后作业
10 . 如图,在平面直角坐标系中,点C是以点
为圆心,1个单位长度为半径的圆上一点,点B的坐标为
,连接
,D是
的中点,连接
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6d9a25d20b86c2583f6c071091e8e3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb442fb1fe1a5d9768cf11c3e1b7ec5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
您最近一年使用:0次