解题方法
1 . 阅读数学材料:“设
为多面体
的一个顶点,定义多面体
在点
处的离散曲率为
,其中
为多面体
的所有与点
相邻的顶点,且平面
,平面
,…,平面
和平面
为多面体
的所有以
为公共点的面.”解答问题:已知在直四棱柱
中,底面
为菱形,
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/275fc582ec511e4c5a2a98f69da0cdff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20559c2fce92126341420a8170dacc2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/183f3fdb3204864ff2f60c8c1dac2f2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db59863ffec5fa450ab8342fd8675c2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9d7f18c3c9dae7e6d4f2e96281289f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f733e19f18ab01a3c022331805ed58a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeed487430a5b8a330f2d0c52166521a.png)
A.直四棱柱![]() |
B.若![]() ![]() ![]() ![]() |
C.若四面体![]() ![]() ![]() ![]() ![]() |
D.若直四棱柱![]() ![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2023-04-13更新
|
2547次组卷
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6卷引用:东北三省四市教研联合体2023届高三一模数学试题
东北三省四市教研联合体2023届高三一模数学试题吉林省长春市2023届高三三模数学试题辽宁省大连市2023届高三一模数学试题(已下线)模块六 专题4 易错题目重组卷(辽宁卷)(已下线)模块六 专题13 易错题目重组卷(吉林卷)云南省曲靖市第二中学2023届高三二模预测数学试题
2 . 如图,在棱长为1的正方体
中,M,N分别是
的中点,过直线
的平面
平面
,则平面
截该正方体所得截面的面积为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf68723c4314474427a26628c973f499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a60be170a52db82cf37b30db0cde26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1885efcff0b903e314057dd153578600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/b77cdcab-d6e4-41d7-80e2-0f51d5e06a65.png?resizew=160)
您最近一年使用:0次
2020-07-10更新
|
276次组卷
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2卷引用:2020年普通高等学校招生全国统一考试 文科数学样卷(八)