1 . 如图,
是棱长为
的正方体,
是棱长为
的正四面体,底面
,
在同一个平面内,
,则正方体中过
且与平面
平行的截面面积是
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/36df5675-3030-4c3f-bee4-ee65ffff8adf.png?resizew=385)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd694ad3a4733c7c84aaa7946aeea4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba98f7ace9e040364128d9f7e7872f4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a250029d1b9fea57033d4609057ad3ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/127a62395633bbdef2d31c6a38290cdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95136b7cf6fa83f13459dfa688799b94.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/36df5675-3030-4c3f-bee4-ee65ffff8adf.png?resizew=385)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
您最近一年使用:0次
2019-04-13更新
|
760次组卷
|
5卷引用:北京市人大附中2023-2024学年高二上学期期中数学试题
北京市人大附中2023-2024学年高二上学期期中数学试题北京市海淀区人大附中2023-2024学年高二上学期期中练习数学试题【省级联考】山东省2019届高三第一次大联考理科数学试题(已下线)第30练 直线、平面平行的判定与性质-2021年高考数学(文)一轮复习小题必刷(已下线)第31练 直线、平面平行的判定与性质-2021年高考数学(理)一轮复习小题必刷
2 . 如图,正方体
中,
为
中点,
为线段
上的动点(
不与
重合),以下四个命题:
)
平面
. (
)
平面
;
(
)
的面积与
的面积相等;
(
)三棱锥
的体积有最大值,其中真命题的个数为.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e539f26ed5e0b20ff7220559324869a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a67521824abc07e3755db95d8f19621.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae7f4612c548b1f72a964ddb291cd2e.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83aba3cdf6a0c3f02729212a8567e398.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef6568efecdabf9e1a2ebeb8438e997.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c055f3cdf216faa22c1e1125f8b9b203.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2018-10-22更新
|
282次组卷
|
4卷引用:北京市和平街第一中学2023-2024学年高二上学期期中调研数学试卷