1 . 如图,正方体
的棱长为
,动点
在线段
上,
、
分别是
、
的中点,则下列结论中正确的是______________ .
与
所成角为
;
②
平面
;
③存在点
,使得平面
平面
;
④三棱锥
的体积为定值.
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7767d492158189b23af332a8016ed37d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1a117da62783feaa0ef0a60115c1aa.png)
③存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bc072594092b2386421d2a5140030cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c52091eb745de866044477641a7c55f.png)
④三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af3bc3ecbb4e8ea44b4bc569dcf7263f.png)
您最近一年使用:0次
2020-03-20更新
|
1332次组卷
|
5卷引用:【新教材精创】11.4.1直线与平面垂直(第1课时)练习(2)
(已下线)【新教材精创】11.4.1直线与平面垂直(第1课时)练习(2)宁夏石嘴山市第三中学2022-2023学年高一下学期期末数学试题(已下线)高一下学期期末复习填空题压轴题二十三大题型专练(2)-举一反三系列(人教A版2019必修第二册)(已下线)【高一模块一】难度5 小题强化限时晋级练 (中等2)2020届江西省南城县第一中学高三上学期期末考试数学(文)试题
解题方法
2 . 如图,在正四棱台
中,
,
分别是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/80c1d676-7c94-4480-b421-793e399a2da1.png?resizew=228)
(1)求证:平面
平面
;
(2)求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0762dd89595098568b3f95867cc87cdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea77ba313fcc751481ac1ca214df3fc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/80c1d676-7c94-4480-b421-793e399a2da1.png?resizew=228)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a51ce3eb0b623016e4175c9254d07d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf9628142422a4884bd59538da6d312.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26d8a9d64ad3c8cba28840b41ed7837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf9628142422a4884bd59538da6d312.png)
您最近一年使用:0次
名校
解题方法
3 . 如图①,有一个等腰直角三角板
垂直于平面
,有一条长为7的细线,其两端分别位于
处,现用铅笔拉紧细线,在平面
上移动.
![](https://img.xkw.com/dksih/QBM/2020/3/1/2410053136965632/2410371364110336/STEM/f49be39448274df3a28ba59848b3c584.png?resizew=445)
图① 图②
(1)图②中的
的长为多少时,
平面
?并给出证明.
(2)在(1)的情形下,求三棱锥
的高.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30208aa5812f1b962cd8528b8411e580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/2020/3/1/2410053136965632/2410371364110336/STEM/f49be39448274df3a28ba59848b3c584.png?resizew=445)
图① 图②
(1)图②中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b62b4113805d8f3fa9f7b204c701af3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e245440d3761fb4217eaa8dc303fa288.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a4d781525777c7b5284dffc70b2a28a.png)
(2)在(1)的情形下,求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1575e76c84b668ab1c12acc2b5adbf.png)
您最近一年使用:0次
2020-03-01更新
|
178次组卷
|
3卷引用:人教A版(2019) 必修第二册 突围者 第八章 综合拓展提升
解题方法
4 . 如图,在矩形
中,
,
为边
的中点,以
为折痕把
折起,使点
到达点
的位置,且使平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/5da9e366-bc01-4e37-8d66-6e8ae8a78fa8.png?resizew=255)
(1)证明:
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80f51c31583fea58fde645474d60b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b72518938d15e0ef7cd71c23201948b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c505f9d4513028bb16e274aae96cba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d70676406f26d339465fe3473c0c05.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/5da9e366-bc01-4e37-8d66-6e8ae8a78fa8.png?resizew=255)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45fbffb9e2c7fa7c5006cde8da0cabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b489ed5afdb721bf9973c9089c504eb.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
您最近一年使用:0次
2020-02-28更新
|
420次组卷
|
2卷引用:苏教版(2019) 必修第二册 必杀技 第13章 立体几何初步 专题4 空间线、面位置关系
名校
解题方法
5 . 如图,在三棱锥
中,
,
,
,
为线段
的中点.
![](https://img.xkw.com/dksih/QBM/2020/2/19/2402332989947904/2402429698957312/STEM/c6ba8886c9e14b36ba4829420da3d75d.png?resizew=194)
求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbb05b8b630052ff544249ebd72d95d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a15a004f7d47ed595f063e60075223a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2020/2/19/2402332989947904/2402429698957312/STEM/c6ba8886c9e14b36ba4829420da3d75d.png?resizew=194)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
您最近一年使用:0次
解题方法
6 . 如图,把等腰直角三角形
沿斜边
所在直线旋转至
的位置,使
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/814c4666-8218-4448-8deb-70541ca62870.png?resizew=149)
(1)求证:平面
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5e1441a49e782ff0ef46e776cde06a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fffc2a946e72f26a8af584d8ead3a396.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/814c4666-8218-4448-8deb-70541ca62870.png?resizew=149)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/282d4a8c3476b2b81e3fd73898e64539.png)
您最近一年使用:0次
2020-02-13更新
|
512次组卷
|
3卷引用:人教A版(2019) 必修第二册 过关斩将 第八章 8.6 空间直线、平面的垂直 8.6.3 平面与平面垂直
7 . 如图所示,在直角梯形
中,
,
分别是
上的点,
,且
(①).将四边形
沿
折起,连接
(②).在折起的过程中,下列说法中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/6e2167c2-cb4e-4931-9707-57369d021146.png?resizew=320)
![](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/0facf189b2a3153beb7b9e077d3b1146.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/186d18e94d6949e12191ade74c5b520c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/6e2167c2-cb4e-4931-9707-57369d021146.png?resizew=320)
A.![]() ![]() |
B.![]() |
C.若![]() ![]() ![]() |
D.平面![]() ![]() |
您最近一年使用:0次
2020-02-13更新
|
1156次组卷
|
6卷引用:人教A版(2019) 必修第二册 过关斩将 第八章 8.6 空间直线、平面的垂直 8.6.3 平面与平面垂直
解题方法
8 . 如图,在四面体
中,
,
,
分别是棱
的中点,则下列结论中不一定成立的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/03fecf99-d32d-498e-9030-058e8fa2fbd3.png?resizew=161)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a351136b18bc7d3bd5122332772ab23b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c383691e8d740830a865b12d66f7633.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/927456b0989846a2f1573844bbaa2105.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9e661d825b7a6061e4d26fe5c53df73.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/03fecf99-d32d-498e-9030-058e8fa2fbd3.png?resizew=161)
A.![]() ![]() | B.![]() ![]() |
C.平面![]() ![]() | D.平面![]() ![]() |
您最近一年使用:0次
2020-02-13更新
|
535次组卷
|
3卷引用:人教A版(2019) 必修第二册 过关斩将 第八章 8.6 空间直线、平面的垂直 8.6.3 平面与平面垂直
解题方法
9 . 已知
是
所在平面外的一点,且
平面
,平面
平面
.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d900531973c546625694146fa1509ab9.png)
您最近一年使用:0次
2020-02-13更新
|
412次组卷
|
4卷引用:人教A版(2019) 必修第二册 过关斩将 第八章 8.6 空间直线、平面的垂直 8.6.3 平面与平面垂直
10 . 如图,在正方形
中,E,F分别是
的中点,D是EF的中点,若沿SE,SF及EF把这个正方形折成一个四面体,使
三点重合,重合后的点记为G,则在四面体S-EFG中,哪些棱与面互相垂直?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ac787c642466044d50f89d5dac41da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d64cdb4dbb052388d448ac4d0a1ba388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a734f37ee72eeb46d2e5e07b2522144.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/40c02109-8fbd-466f-9163-7d6ad887491f.png?resizew=153)
您最近一年使用:0次
2020-02-03更新
|
752次组卷
|
3卷引用:人教A版(2019) 必修第二册 逆袭之路 第八章 8.6 空间直线、平面的垂直 小结