1 . 如图,正方体
的棱长为
,
分别是棱
,
的中点,过点
的平面分别与棱
,
交于点G,H,给出以下三个命题:
![](https://img.xkw.com/dksih/QBM/2022/5/9/2975877629870080/2977747867877376/STEM/9658becc-e915-41aa-a5cf-73030600baa8.png?resizew=195)
①平面
与平面
垂直;
②四边形
的面积的最小值为
;
③四棱锥
的体积为定值
.
其中正确命题的序号为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://img.xkw.com/dksih/QBM/2022/5/9/2975877629870080/2977747867877376/STEM/9658becc-e915-41aa-a5cf-73030600baa8.png?resizew=195)
①平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1522a9c3b2466395570c2689a4055584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bf9ef324f1289e205e29fed105c38e.png)
②四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1522a9c3b2466395570c2689a4055584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
③四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11719e323e73b9512869d6aca6aaae75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e6486784415f3537c9a13556c05d893.png)
其中正确命题的序号为
您最近一年使用:0次
2022-05-12更新
|
416次组卷
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4卷引用:吉林省长春市2022届高三下学期质量监测(四)数学文科试题