如图,在四边形
中,
,
,
、
分别是
和
的平分线.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0facf189b2a3153beb7b9e077d3b1146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d01fc460614df9db458986ae7de8327e.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/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e576dcf6e1578b9e02ab363ecc2bd20.png)
![](https://img.xkw.com/dksih/QBM/2019/8/9/2265110730670080/2266396395995136/STEM/a07acf85d1c649b4893dc1122ababa7b.png?resizew=146)
更新时间:2019-08-11 11:38:10
|
【知识点】 根据平行线判定与性质证明
相似题推荐
解答题-证明题
|
适中
(0.65)
【推荐1】如图所示,点A的坐标为
,点B的坐标为
,将三角形
沿x轴负方向平移3个单位长度,平移后的图形为三角形
.
(2)在四边形
中,点P从点B出发沿
移动,若点P的速度为每秒1个单位长度,运动时间为t秒,回答下列问题:
①点Р的横坐标与纵坐标互为相反数时,求出t为多少秒;
②当
时,设
,
,
,探索x,y,z之间的数量关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff32d26c8d44f5fb4813a19c1030a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4772c835cbe626040ecc4df30e6f0ccc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/678b28fddb166d90878d24d6e5481080.png)
(2)在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9853c90ab11d8bf821168accaffb8c1.png)
①点Р的横坐标与纵坐标互为相反数时,求出t为多少秒;
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2fa276c1b5ac04a1c06f82e091b1bd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d2d92d4dc14bac13af8618318a4fa5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b102597d403eb57c20ff2731002ae074.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f167af261d4a0df7953cd4c848bd90fd.png)
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