如图,
,
,
是否与
平行,若不平行,需添加___________ (只填出一种即可)的条件,使
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284e282bb1d9fbf8634b3506ee5358ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e459e24a3c880c0aaa155e56a8dde9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/21/ee324074-0344-4fa7-b860-56f69d208c76.png?resizew=148)
22-23七年级上·重庆·期末 查看更多[3]
重庆市2022-2023学年七年级上学期期末数学试题(已下线)1.4 平行线的性质(分层练习)-2022-2023学年七年级数学下册同步精品课堂(浙教版)(已下线)5.3 平行线的性质-2022-2023学年七年级数学下册《考点·题型·技巧》精讲与精练高分突破系列(人教版)
更新时间:2023-01-19 13:17:19
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【推荐1】如图,由下列条件可判定哪两条直线平行,并说明根据.
![](https://img.xkw.com/dksih/QBM/2019/1/3/2110723696836608/2113628773081089/STEM/171afd517074404ebc25124838ba57a9.png?resizew=175)
(1)∠1=∠2,________________________ .
(2)∠A=∠3,________________________ .
(3)∠ABC+∠C=180°,________________________ .
![](https://img.xkw.com/dksih/QBM/2019/1/3/2110723696836608/2113628773081089/STEM/171afd517074404ebc25124838ba57a9.png?resizew=175)
(1)∠1=∠2,
(2)∠A=∠3,
(3)∠ABC+∠C=180°,
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【推荐2】如图,直线a、b都与直线c相交,给出下列条件:①
=
;②
+
=
;③
=
;④
+
=
,其中能判断a∥b的条件是:______ .(把你认为正确的序号全部填在空格内)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2e9d12c161513a8b31acfcc5e74882f.png)
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【推荐2】如图,在四边形ABCD中,
,E、F、G分别是AB、CD、AC的中点,若
,
,则
等于______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d2530e7023b2345c651e8f53629ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19427598a86f6c13e6a2d6da0fa3877e.png)
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