如图所示,在△ABC中,AD平分∠BAC,DE⊥AB于点E,DF⊥AC于点F,试说明AD与EF的位置关系.
![](https://img.xkw.com/dksih/QBM/2019/11/8/2333840577175552/2348763892555776/STEM/c69a27ad39c94e7082898fa2546e93c8.png?resizew=121)
19-20八年级上·山东德州·期中 查看更多[2]
山东省德州市武城县实验中学2019-2020学年八年级上学期期中数学试题(已下线)专题06线段、角的轴对称性(3个知识点11种题型2种中考考法)-【帮课堂】2023-2024学年八年级数学上册同步学与练(苏科版)
更新时间:2019-12-05 20:35:17
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在平行四边形
中,
,
,过点A作边
的垂线
交
的延长线于点E,点F是垂足,连接
、
,
交
于点O.求证
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/5/e12ac391-04ca-4690-a6be-abcd1ea0f712.png?resizew=216)
(1)四边形
是正方形;
(2)
;
(3)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/5/e12ac391-04ca-4690-a6be-abcd1ea0f712.png?resizew=216)
(1)四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42a876bc003f6c042c24ff4d8c11c8a8.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bebe986272170363fa38cc0bae352a47.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70dd39996338d8feccfb2e3bffbe85d4.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图(1)所示,A,E,F,C在一条直线上,AE=CF,过E,F分别作DE⊥AC,BF⊥AC,若AB=CD,求证EG=FG.(提示:先证△ABF≌△CDE,得BF=DE,再证△BFG≌△DEG);若将△DEC的边EC沿AC方向移动,变为图(2)时,其余条件不变,上述结论是否成立?请说明理由.
![](https://img.xkw.com/dksih/QBM/2019/12/9/2351431168368640/2352157898293248/STEM/82b7e4a95d0c4baf8e42bbda9b31c49c.png?resizew=506)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在
中,
是
的平分线,
于点H,
.
(1)在线段
上找一点P,使
,连接
.求证:
;
(2)若
的面积等于100,
的面积等于80,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a10809d172017faa4b3bf06c8a61a5c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07e395831eddeca6f5ae769b2dfa2b4d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/16/cdfe5940-2c84-4853-b72f-5ba9d207258b.jpg?resizew=138)
(1)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db1353f09173501a23a4f004ef170b81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d48943db264c08adaf6ae0766fd56459.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57120c4c2a04315b21ad42787b0c9e29.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/101da161ae17652ccbe7d3f888762c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20d576d3824eaf583c67809124c6327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52bd1a62f608d5ec18d2c7bb8c7d8c14.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,在中,
、
分别平分
、
,交
于点E、G.
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fa9015be066d3e7ca5efa98f63f2ecb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1596f7c0d0bab4e7e586d705d323e0d8.png)
(2)过点E作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab00e0cff0876c4183a47f1272cf9928.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a028fd5b281ef168702a803baca6e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次