解题方法
1 . 如图,在长方体
中,E,M,N分别是
的中点,求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1142fad64ce162314e60c741b376f041.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aca256a2888582d7691ce62453a49bc.png)
您最近一年使用:0次
2023-08-12更新
|
387次组卷
|
5卷引用:人教B版(2019) 必修第四册 逆袭之路 第十一章 立体几何初步 11.3.3 平面与平面平行
人教B版(2019) 必修第四册 逆袭之路 第十一章 立体几何初步 11.3.3 平面与平面平行河南省郑州励德双语学校2022-2023学年高一下学期期中考试数学试题(已下线)13.2.4 平面与平面的位置关系(1)-【帮课堂】(苏教版2019必修第二册)(已下线)8.5空间直线、平面的平行——课堂例题(已下线)8.5.3 平面与平面平行-同步精品课堂(人教A版2019必修第二册)
名校
解题方法
2 . 在如图所示的多面体中,四边形
是平行四边形,四边形
是矩形,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/10/d2fbe568-6939-45eb-99a9-ff754e4f1416.png?resizew=168)
(1)求证:
平面
;
(2)若
,
,
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f84f169e50dc59d4f7a8e1e36f5c847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1d3de310412c0fa445acd2cdb61513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/10/d2fbe568-6939-45eb-99a9-ff754e4f1416.png?resizew=168)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc521258fcaeaf7acffc5ae98c3af6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1f1d7219cd40346442b33dba84deb5c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829ce6cd87e497ff19ed7edd861e6676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5595129319f9f5f069297ddb1455f97a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/062e008fb2224a797b360a10e0c4e688.png)
您最近一年使用:0次
2023-01-09更新
|
401次组卷
|
3卷引用:陕西省渭南市蒲城县2021-2022学年高一上学期期末数学试题
名校
解题方法
3 . 如图,在四面体A-BCD中,AB⊥平面BCD,BC⊥CD,BC=2,∠CBD=
,E、F、Q分别为BC、BD、AB边的中点,P为AD边上任意一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/d4af287d-9e2d-4522-a3b7-9bfd785b4b2a.png?resizew=148)
(1)证明:CP
平面QEF.
(2)当二面角B-QF-E的平面角为
时,求AB的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/d4af287d-9e2d-4522-a3b7-9bfd785b4b2a.png?resizew=148)
(1)证明:CP
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
(2)当二面角B-QF-E的平面角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
您最近一年使用:0次
2021-12-04更新
|
1323次组卷
|
6卷引用:湖北省武汉市五校联合体2020-2021学年高一下学期期末数学试题
2023高三·全国·专题练习
解题方法
4 . 如图,在四棱锥
中,
是边长为2的正三角形,
,
,
,
,
,
分别是线段
,
的中点,求证:
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a03203dd5ac79dd8c6707e4340773359.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e29ed30f17b5944e4afc66ab1d5f7394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40119815a7f913caa86bc5aa118fcf35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0e3bb16a53a428d91cf7fa9652d45f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e8cbd7e797606cd87544a63488d5951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06fa0a286a55692e4263a5993b01580b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ffc7d1af9053b027cf9e726f5367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6785c7c85a503531649f9c9b4cbfcf04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a03203dd5ac79dd8c6707e4340773359.png)
![](https://img.xkw.com/dksih/QBM/2022/8/19/3048101412397056/3048670099963904/STEM/659d2a3f5c984752ac4a43fde14c57bf.png?resizew=136)
您最近一年使用:0次
2023高二·全国·专题练习
5 . 直四棱柱
,
,
,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49437f474e5805688dff21ded2d1fd7c.png)
平面
;
(2)若四棱柱体积为36,求二面角
大小的正切值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8ef58be8708144272538ee427fb92c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49437f474e5805688dff21ded2d1fd7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ebe6a446b91e73b181f9f4d56264dd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b54387f870ae37f7951b253665d64f6.png)
(2)若四棱柱体积为36,求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cab6ad3d3e3064fa417a02dba02dbf04.png)
您最近一年使用:0次
2023-08-23更新
|
387次组卷
|
4卷引用:第17讲 第八章 立体几何初步 章末重点题型大总结-【帮课堂】(人教A版2019必修第二册)
(已下线)第17讲 第八章 立体几何初步 章末重点题型大总结-【帮课堂】(人教A版2019必修第二册)(已下线)重难点专题14 利用传统方法解决二面角问题-【帮课堂】(苏教版2019必修第二册)(已下线)第09讲 拓展三:二面角的传统法与向量法(含探索性问题,7类热点题型讲练)-【帮课堂】2023-2024学年高二数学同步学与练(人教A版2019选择性必修第一册)(已下线)专题突破卷19传统方法求夹角及距离-2
6 . 如图,已知正方体
的棱长为
,
、
分别为棱
、
的中点.
平面
;
(2)设平面
与平面
的交线为
,求点
到直线
的距离及二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a8ec2583c364c079a7b1bfb1e8fe0c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ad6b3d073d8dd1cb7d9c89116b9d81.png)
(2)设平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2ad6b3d073d8dd1cb7d9c89116b9d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90fc2a8903fe0660f618e787c14be2cd.png)
您最近一年使用:0次
21-22高一下·浙江·期中
7 . 已知三棱锥
中,△ABC,△ACD都是等边三角形,
,E,F分别为棱AB,棱BD的中点,G是△BCE的重心.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/30/4c768d18-52ee-428a-958c-36eeb689cbf2.png?resizew=196)
(1)求异面直线CE与BD所成角的余弦值;
(2)求证:FG
平面ADC.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b94651d11df3a469d7ac72e6ac74c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/30/4c768d18-52ee-428a-958c-36eeb689cbf2.png?resizew=196)
(1)求异面直线CE与BD所成角的余弦值;
(2)求证:FG
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
您最近一年使用:0次
名校
解题方法
8 . 如图,在四棱锥
中,底面ABCD是平行四边形,E,F分别是CD,PB的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/a7594f3f-1235-449f-abc9-c2ebee1a4fcc.png?resizew=140)
(1)证明:
平面PAD.
(2)若四棱锥
的体积为32,
的面积为4,求B到平面DEF的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/a7594f3f-1235-449f-abc9-c2ebee1a4fcc.png?resizew=140)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
(2)若四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
您最近一年使用:0次
2022-12-03更新
|
855次组卷
|
5卷引用:辽宁省沈阳市第一二〇中学2022-2023学年高一下学期第三次质量监测数学试题
2023高三·全国·专题练习
解题方法
9 . 在矩形ABCD中,
,
.点E,F分别在AB,CD上,点
分别在
上,且
,
.沿EF将四边形AEFD翻折至四边形
,点
平面BCFE.
平面
;
(2)求证:
与BC是异面直线;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c4cd264c97c1f261229925cc5a6761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b0393ce62b24aa5f9b740d4cc6743b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3362a45b72536c714c5107b0ae94f1c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c76e6c67644b8bad9bfe11c7ec3081d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7829855159327b2a87c3a424b3f7134a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f235281692aa274a672d57fc400bd45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b12cffc313a181f666e3fc8e66b6f59.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284750727aa2c32b2477d126daefb329.png)
您最近一年使用:0次
10 . 如图,
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b2531a14239af1cb3a5e3cbae5edffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/298cc3d9bc6dc88c494b5489ee2ca846.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/20/2c8a359f-1c0d-4a7f-add1-b32e3dd82021.png?resizew=168)
(1)求证:
平面
;
(2)求点
到平面
的距离;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b2531a14239af1cb3a5e3cbae5edffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/298cc3d9bc6dc88c494b5489ee2ca846.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f5edcfffbdd3a28ddf78b3e089238e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411d1139c919736044af6379743b3d5c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/20/2c8a359f-1c0d-4a7f-add1-b32e3dd82021.png?resizew=168)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9d32e76582bf550593fdef53e081225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20af148464904e21f4374cc8fb886fba.png)
您最近一年使用:0次