如图,直线
与直线
相交得到
, 直线
与直线
相交得到
,点
,
,
与点
,
,
分别在同一直线上. 从①
,②
,③
三个条件中,选出两个作为已知条件,另一个作为结论组成一个问题.
(如∶从①
,②
两个条件中,选出一个作为已知条件,另一个作为结论可以提出两个问题:已知
,求证:
和已知
,求证:
)
(1)你能提出几个问题?并把你的问题写出来.
(2)从你提出的问题中,任选一个并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5b69d40b75d582c4b8ffa2369af1d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e53497af8899cb299d762f1a4f46a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1beff025b32f688316009552d2fd8e1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e6f5241f614c7d310cbf3e25a6d615.png)
(如∶从①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f22fec5a381ae8aca93d876e54c79de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a7b6a5128d5234310c49e14e980a34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f22fec5a381ae8aca93d876e54c79de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a7b6a5128d5234310c49e14e980a34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a7b6a5128d5234310c49e14e980a34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f22fec5a381ae8aca93d876e54c79de.png)
(1)你能提出几个问题?并把你的问题写出来.
(2)从你提出的问题中,任选一个并证明.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/11/5a65829c-6d0e-471c-b17c-148f36ca6408.png?resizew=125)
更新时间:2018-05-07 18:16:47
|
【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】根据解答过程填空(写出推理理由或根据):
如图,在四边形
中,F为
延长线上一点,连接
交
于点E,若
,
,试说明
.
(已知),
∴
(____________________________).
∴
=___________(_____________________________).
∵
(已知),
∴___________=
(等量代换).
∴
(_____________________________).
如图,在四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167dc80bad1e98a81fa4084455215b6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4fd85cff10e8f192cfe0b0a8b2f4996.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8ef58be8708144272538ee427fb92c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167dc80bad1e98a81fa4084455215b6e.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c70da5af382788e6ace00470c05c5e2.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c543c3ddc3723fde6bbfca3ea3b921b.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4fd85cff10e8f192cfe0b0a8b2f4996.png)
∴___________=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/300d3ec6447250bb25915ae86873929a.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8ef58be8708144272538ee427fb92c.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】已知:如图∠1=∠2,∠C=∠D,证明:∠DEC+∠C=180°.
您最近一年使用:0次