空间四边形ABCD中,E、F、G、H分别是AB、BC、CD、DA的中点.
①若AC=BD,则四边形EFGH的形状是____ ;
②若AC⊥BD,则四边形EFGH的形状是____ .
①若AC=BD,则四边形EFGH的形状是
②若AC⊥BD,则四边形EFGH的形状是
18-19高一·全国·单元测试 查看更多[5]
(已下线)第02章 章末检测(B)-2018-2019版数学创新设计课堂讲义同步系列(人教A版必修2)(已下线)第01章 立体几何初步(B)-2018-2019版数学创新设计课堂讲义同步系列(北师大版必修2)(已下线)第1章 章末检测(B)-2018-2019版数学创新设计课堂讲义同步系列(苏教版必修2)(已下线)专题8.4 空间直线、平面的平行(A卷基础篇)-2020-2021学年高一数学必修第二册同步单元AB卷(新教材人教A版,浙江专用)四川省自贡市田家柄中学教育集团2021-2022学年高二上学期期中考试数学试题
更新时间:2019-02-08 20:41:34
|
【知识点】 平行公理
相似题推荐
填空题-单空题
|
较易
(0.85)
【推荐1】已知
为直线,
为空间的两个平面,给出下列命题:①
;②
;③
;④
.其中的正确命题为________________ .
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573182759813120/1573182765727744/STEM/12e2c5a9712c4581ad2b2db69167272b.png?resizew=31)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573182759813120/1573182765727744/STEM/2869bc083f994310b35bf65dc6a37264.png?resizew=33)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573182759813120/1573182765727744/STEM/53ee8093d66448359a3673a2f2cdb97d.png?resizew=112)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573182759813120/1573182765727744/STEM/e39a2605d300497092544e28c25c996f.png?resizew=114)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573182759813120/1573182765727744/STEM/443c0baede294b1395be553e50e8a4ee.png?resizew=116)
![](https://img.xkw.com/dksih/QBM/2016/11/25/1573182759813120/1573182765727744/STEM/14601e9d9e7a459a836357d7d2553f1f.png?resizew=113)
您最近一年使用:0次
填空题-单空题
|
较易
(0.85)
【推荐2】如图所示,
是
所在平面外一点,
,
分别是
和
的重心.若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2b3247afa684b10c8e1da99cf33d5b.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/454328a8e75953fdb0835ce80d9566e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a2b3247afa684b10c8e1da99cf33d5b.png)
![](https://img.xkw.com/dksih/QBM/2018/1/1/2084568238112768/2084831220768768/STEM/f1687bdb43d34ff39a52f38da1c76f05.png?resizew=174)
您最近一年使用:0次