解题方法
1 . 如图所示,在长方体
中,点
是棱
上的一个动点,若平面
与棱
交于点
,给出下列命题:①四棱锥
的体积恒为定值;②直线
与直线
交于点
,直线
与直线
交于点
,则
、
、
三点共线;③当截面四边形
的周长取得最小值时,满足条件的点
至少有两个;④
为底面
对角线
和
的交点,在棱
上存在点
,使
平面
,其中真命题是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/519064ed-ae9c-46d2-8dbe-dbafecd6ad43.png?resizew=158)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a83c0b8db2205a6815811aa4ff5390f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b492d99c54c1d881aa0532d918c19389.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15dc61d5de97b5a40be925b278ae494c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/408871c2b71ef88d6f556ce53cf73cc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6069dc466eec75bbeb3d5c9b51cb3a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3869b3d43cd1d050dac2baecc169f957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba4cffe5e9a3c0f5d2e3ac65fa30587d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/519064ed-ae9c-46d2-8dbe-dbafecd6ad43.png?resizew=158)
A.①②③ | B.②③④ | C.①②④ | D.①③④ |
您最近一年使用:0次
2023-04-25更新
|
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4卷引用:内蒙古赤峰市2023学年高三二模数学理科试题
内蒙古赤峰市2023学年高三二模数学理科试题(已下线)专题12立体几何(选填)(已下线)第一章 点线面位置关系 专题四 共线问题 微点2 立体几何共线问题的解法综合训练【基础版】四川省成都市金苹果锦城第一中学2024届高三上学期期中数学(理)试题
名校
解题方法
2 . 如图所示,在直角梯形
中,
,
分别是
上的点,
且,
(如图1).将四边形
沿
折起,连接
,
,
(如图2).在折起的过程中,则下列表述:
①
平面
;
②四点B、C、E、F可能共面;
③
,则平面
平面
;
④平面
与平面
可能垂直.
其中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/2cf008c7-3aba-484e-a800-d70e78e5f235.png?resizew=389)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b312dab930cbbb9a4bb1a99f044dab73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787786e2f203f629ecfb9ec53814c1f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65436512ecbaefba4ac8123c55094211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ca4c94b0eca19242a0de1005dda885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5f2275cfc3cc50b92b16288db72cfe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8197bf06d017950c85c3ba6a291c095e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
②四点B、C、E、F可能共面;
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c1be2a5bfe8bab50cb68fe52d0f92ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9367449a5847eade07e69f4feddcb027.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
④平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
其中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/2cf008c7-3aba-484e-a800-d70e78e5f235.png?resizew=389)
A.①④ | B.①③ | C.②③④ | D.①②④ |
您最近一年使用:0次
2020-11-09更新
|
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6卷引用:内蒙古赤峰市松山区2020-2021学年高三第一次统一模拟考试理科数学试题
内蒙古赤峰市松山区2020-2021学年高三第一次统一模拟考试理科数学试题(已下线)必刷卷05-2021年高考数学(理)考前信息必刷卷(新课标卷)(已下线)必刷卷01-2021年高考数学(文)考前信息必刷卷(新课标卷)宁夏银川市2021届高三考前适应性训练(二)数学(文)试题四川省眉山市彭山区第一中学2021-2022学年高二上学期10月月考数学(文)试题(已下线)第28讲 直线与直线平行 2