如图,
与
、
相交于点A、C,
平分
交
于点E,
,
.试判断直线
与
的位置关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b28f28ced0531d1df34fcf04c6c67f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2f808c3181f2d353cd171f47225d916.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c31cb8b2923feb14ff5af90c8d07443.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
2023七年级下·江苏·专题练习 查看更多[3]
(已下线)7.2 探索平行线的性质-【帮课堂】2022-2023学年七年级数学下册同步精品讲义(苏科版)江苏省盐城市滨海县 2023-2024学年七年级下学期3月月考数学试题(已下线)第01讲 探索直线平行的条件(3大考点+7种题型+强化训练)-【帮课堂】2023-2024学年七年级数学下册同步学与练(苏科版)
更新时间:2023-01-10 17:15:57
|
相似题推荐
解答题-问答题
|
较易
(0.85)
【推荐1】如图,
为直角,
为锐角,且
平分
,
平分
,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/b7edcfa7-7711-4a20-9740-b2d4a67a27cd.png?resizew=134)
(1)如果
,求
的度数.
(2)如果
为任意一个锐角,你能求出
的度数吗?若能,请求出来,若不能,说明为什么?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/b7edcfa7-7711-4a20-9740-b2d4a67a27cd.png?resizew=134)
(1)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79684a6e92297749c005e2b23cac9710.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐2】已知直线
与
相交于点O,且
平分
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/21/d25303e9-02b7-4d05-9aae-3564708ec83e.png?resizew=304)
(1)如图1,若
平分
,求
的度数;
(2)如图2,若
,
,求
的度数.
![](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/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fed1f57a835af4e9022e27603d12d31.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/21/d25303e9-02b7-4d05-9aae-3564708ec83e.png?resizew=304)
(1)如图1,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22df2977de56cc69be0c1e847653d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27935c1ef4df2d52ac697678a3c8f39d.png)
(2)如图2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e1cb91c1a36a376b15494ed9f5a605c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3ccb43afe62d7ade409fce3cbebb5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2f7bab4ed36ec5d04db3aeed2796f2.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐1】如图,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356bc440d3a8ef77891c8e65dc14610c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/30/a1254987-e9ac-419f-bd2e-ad33418f6536.png?resizew=161)
(1)
等于多少度?
(2)AD与BC平行吗?请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356bc440d3a8ef77891c8e65dc14610c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/30/a1254987-e9ac-419f-bd2e-ad33418f6536.png?resizew=161)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7500b29d3e9d016e663ea59750a44545.png)
(2)AD与BC平行吗?请说明理由.
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐2】请根据所给图形回答下列问题:
(1)若
,
,请写出
与
的位置关系,并给予证明;
证明:
与
垂直.
∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42074af1b0909e9dba0c626ea131a770.png)
∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9ab1067df149fc91a3a672b0fd418c6.png)
∴
(__________)
∴
(__________)
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaa106172cc7b3db22ebbcbc1fe84c04.png)
(2)在(1)的结论下,如果
,又能得到哪两条线段平行呢?下面是小明同学不完整的解答过程,请补充完整.
∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/472d848a65a659621ab28735f37b6ceb.png)
∴
(__________)
∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e50ce9ef89a466df68124a1dccff5663.png)
∴__________(__________)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/18/10739cb4-d9e2-43aa-9a6d-1fe941099af4.png?resizew=157)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9ab1067df149fc91a3a672b0fd418c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42074af1b0909e9dba0c626ea131a770.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9ab1067df149fc91a3a672b0fd418c6.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/472d848a65a659621ab28735f37b6ceb.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b7b6f74b107699398eed6bd3e62dc61.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaa106172cc7b3db22ebbcbc1fe84c04.png)
(2)在(1)的结论下,如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/472d848a65a659621ab28735f37b6ceb.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d642f5c22739beb5b658574e8844d7bb.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e50ce9ef89a466df68124a1dccff5663.png)
∴__________(__________)
您最近一年使用:0次