已知:如图,在
中,
,AD是BC边的中线,AN为
的外角
的平分线,
于点E,线段DE交AC于点F.
求证:四边形ADCE为矩形;
线段DF与AB有怎样的关系?证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882589c896c6993d9687f0e14a283481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6652e729301d2dfb5770b29e035d96b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882589c896c6993d9687f0e14a283481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7795199d6ae4954d08a5ceb32e98d29c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3da5f3235584d27290bc9515b65e167d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/6/1adef428-f938-4a26-8461-70041ed19596.png?resizew=136)
更新时间:2019-04-06 17:08:54
|
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图,等边
中,AH为BC边上的高,点P是AH上任意一点,且点P与点A不重合,点D、E、F、G分别是AB,BP,CP,AC的中点.
![](https://img.xkw.com/dksih/QBM/2021/8/3/2778241965613056/2789451197169664/STEM/96fa9d9b-1c78-496f-b413-ac9e3e3443b7.png)
(1)求证:四边形DEFG是矩形;
(2)写出图中的所有等腰三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://img.xkw.com/dksih/QBM/2021/8/3/2778241965613056/2789451197169664/STEM/96fa9d9b-1c78-496f-b413-ac9e3e3443b7.png)
(1)求证:四边形DEFG是矩形;
(2)写出图中的所有等腰三角形.
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,点E在边
上,连接
,过点C作
于点F,且
.请判断四边形
的形状,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b62ce0cbffa4758c7a0e6fb7ca4d24e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c581dab991aeadf06d972e47673ea8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/910936ec9fb419d51ce2f5ea817f8401.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/25/60b5b4e2-5f54-445b-8e1b-1f850814405e.png?resizew=142)
您最近一年使用:0次