1 . 如图,四边形
中,
,
,
,
,
、
分别在
、
上,
,现将四边形
沿
折起,使平面
平面
.
(
)若
,是否存在折叠后的线段
上存在一点
,且
,使得
平面
?若存在,求出
的值;若不存在,说明理由.
(
)求三棱锥
的体积的最大值,并求此时点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0facf189b2a3153beb7b9e077d3b1146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1391573c30964b87ca3429bf67ae22aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb8df9fecaa0b266568ad35fb8f0e019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c674dc5024374f53920947c4cf4baf11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6240d4cf0fb44aa1e6bdaf2a4bdfb37e.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc90c2d45477e166b02359525f40aa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/990dd9375705012701133aea354fd145.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c8fcf28ce826ee6c876a00017dc4623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b67046592a3153a442165064287fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://img.xkw.com/dksih/QBM/2017/12/28/1848177816166400/1848936292253696/STEM/8bf869be8858497eae225d1aa5f6ee18.png?resizew=437)
您最近一年使用:0次
2017-12-29更新
|
531次组卷
|
3卷引用:广东省广州市番禺区仲元中学2016-2017学年高一上学期期末考试数学试题
名校
2 . 已知平行四边形
的三个顶点的坐标为
.
(Ⅰ)在
中,求边
中线所在直线方程
(Ⅱ) 求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c7fed19ff43c6a72847dfdcacbcfff.png)
(Ⅰ)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(Ⅱ) 求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://img.xkw.com/dksih/QBM/2017/12/14/1838195340296192/1838314674896896/STEM/48dcc140693545658cf8a2885d77d956.png?resizew=134)
您最近一年使用:0次
2017-12-14更新
|
570次组卷
|
6卷引用:广东省汕头市达濠华桥中学2017-2018学年高二上学期阶段考试(二)数学理试题
广东省汕头市达濠华桥中学2017-2018学年高二上学期阶段考试(二)数学理试题(已下线)黄金30题系列 高二年级数学(理) 大题好拿分【基础版】(已下线)黄金30题系列 高二年级数学(文) 大题好拿分【基础版】陕西省汉中市汉台中学、西乡中学2017-2018学年高一上学期期末联考数学试题安徽省淮南市第一中学2018-2019学年高一年级第二学期第二次段考数学试题安徽省滁州市定远县育才学校2019-2020学年高二(普通班)上学期第三次月考数学(理)试题
3 . 如图,在四棱锥
中,
,
,
,平面
底面
,
,
和
分别是
和
的中点.
![](https://img.xkw.com/dksih/QBM/2017/10/25/1802834963701760/1804557610106880/STEM/6cf20964aacc4747982d92c7a6f87065.png?resizew=179)
(1)求证:
平面
;
(2)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64f1161e0345b3646c71365430dccbb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db27b7f29d7d01b2692f217bc3079fc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/2017/10/25/1802834963701760/1804557610106880/STEM/6cf20964aacc4747982d92c7a6f87065.png?resizew=179)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c372d059202ec388960b125d4a87dc84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e51838e395dfc9d9ef597d9e01f46272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2017-10-27更新
|
685次组卷
|
6卷引用:广东省中山市2016-2017学年高一第一学期期末统一考试数学试题
4 . 在三棱锥
中,
.
(1)证明:面
面
.
(2)求点
到平面
的距离.
(3)求二面角
的平面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2823bdb03fbdacb513498a41ac63b3d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dce342cdb334cf027eb7f2521199847.png)
(1)证明:面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23ba7c9832fca9661b28499a09be309f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc5ea3b02aa149ab24f9faa04339744.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e26f6882176a6eaf6efa979cbc09fa.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f032bd3dad9771ab5bf46ecb98a77cf.png)
![](https://img.xkw.com/dksih/QBM/2018/12/12/2095181469040640/2096819431505920/STEM/c854515c6ef344758eaff4aa333ac06b.png?resizew=159)
您最近一年使用:0次
2017-02-22更新
|
1215次组卷
|
2卷引用:2016-2017学年广东省揭阳市第一中学高一上学期期末考试数学试卷
2010·陕西·模拟预测
5 . 如图,三棱锥P-ABC中,PC
平面ABC,PC=AC=2, AB=BC,D是PB上一点,且CD
平面PAB
![](https://img.xkw.com/dksih/QBM/2013/5/27/1571230160248832/1571230165958656/STEM/dc7b61d1-91dd-4817-a704-55c0ecf52486.png)
(1)求证:AB
平面PCB;
(2)求异面直线AP与BC所成角的大小;
(3)求二面角C-PA-B 的大小的余弦值.
![](https://img.xkw.com/dksih/QBM/2013/3/25/1571162454581248/1571162460323840/STEM/762ba727dd8243afb13351e7e3971b72.png)
![](https://img.xkw.com/dksih/QBM/2013/3/25/1571162454581248/1571162460323840/STEM/762ba727dd8243afb13351e7e3971b72.png)
![](https://img.xkw.com/dksih/QBM/2013/5/27/1571230160248832/1571230165958656/STEM/dc7b61d1-91dd-4817-a704-55c0ecf52486.png)
(1)求证:AB
![](https://img.xkw.com/dksih/QBM/2013/3/25/1571162454581248/1571162460323840/STEM/762ba727dd8243afb13351e7e3971b72.png)
(2)求异面直线AP与BC所成角的大小;
(3)求二面角C-PA-B 的大小的余弦值.
您最近一年使用:0次
6 . 如图,在四棱锥
中,底面
是直角梯形,
,
,
,
平面
,
为
中点.
![](https://img.xkw.com/dksih/QBM/2017/2/16/1625370083459072/1636090688446464/STEM/6c6f3fe252324df29d0a52bea9927f9d.png?resizew=231)
(Ⅰ)证明:
平面
;
(Ⅱ)设
,
,
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb9f0d4504d3d50bfbaa8b9c2d152ba9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5997d11a2764c07eec6a20b5d4bdd7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b67e4456cc47f6b97820081d6d3b14d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf5d7d6e235b6aef6df46a66ac706890.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/268c3bf6bcc7d0f8455aa98e85869cce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5f13bd9bbf6aded594a1647c297d06d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5997d11a2764c07eec6a20b5d4bdd7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://img.xkw.com/dksih/QBM/2017/2/16/1625370083459072/1636090688446464/STEM/6c6f3fe252324df29d0a52bea9927f9d.png?resizew=231)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369f1d96fc08a0bcb7f1f0235c576538.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00d4825584cf2a3f381de72c179e22.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780e1e092215e7022905b5a6f2116898.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f0df3d5703b3c192d54956b1464fe13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7aa8c324d0024236f7055d9e32a1f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae4b97dd6e72a5ec06f44164a91b429f.png)
您最近一年使用:0次
7 . 如图①,在直角梯形
中,
,
,
,点
是
边的中点,将
沿
折起,使平面
平面
,连接
,
,
,得到如图②所示的几何体.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/6f7128ac-cbe1-40bb-90c9-174bb3545b3f.png?resizew=380)
(1)求证:
平面
;
(2)若
,
与其在平面
内的正投影所成角的正切值为
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15f0d3d800ff70b765756ead8ca8d089.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5e1441a49e782ff0ef46e776cde06a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/6f7128ac-cbe1-40bb-90c9-174bb3545b3f.png?resizew=380)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d78fc7fcb2762de28dcef8aa3aa0e49.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35361e76a7c85d1886728c8d0200b234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
您最近一年使用:0次
2019-12-07更新
|
181次组卷
|
6卷引用:2017届广东省广州市高三3月综合测试(一)数学文试卷
2017届广东省广州市高三3月综合测试(一)数学文试卷广东省广州2017届高三下学期第一次模拟(文)数学试题人教B版(2019) 必修第四册 逆袭之路 第十一章 立体几何初步 本章整合提升江苏省镇江市扬中市第二高级中学2021-2022学年高二上学期期初检测数学试题江苏省镇江市扬中市第二高级中学2021-2022学年高二下学期期初数学试题(已下线)专题8.5 直线、平面垂直的判定及其性质(练)【理】-《2020年高考一轮复习讲练测》
8 . 如图,三棱锥
中,
,底面
为正三角形.
![](https://img.xkw.com/dksih/QBM/2017/2/4/1619481377251328/1619481377824768/STEM/74f263c3059e486e96b910def47ab5fc.png)
(Ⅰ)证明:
;
(Ⅱ)若平面
,
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb96e0331eebe80ed1ff610faf531fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/2017/2/4/1619481377251328/1619481377824768/STEM/74f263c3059e486e96b910def47ab5fc.png)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbd7c2767c106faf27d6a97ebc8e739.png)
(Ⅱ)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e73f67ca1f0eb7d7d30367d32e38833f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8352d5c45ab39423140d9d2db6ad192.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a438393ddfc7da1804baf4932442bb35.png)
您最近一年使用:0次
2017-01-20更新
|
1348次组卷
|
2卷引用:2017届广东省高三理上学期阶段性测评一数学试卷
9 . 如图,多面体
中,
,
平面
,四边形
是菱形.
![](https://img.xkw.com/dksih/QBM/2018/5/31/1957148377391104/1961568540639232/STEM/2bdb0edb41f94a40a2502a58d3d1083d.png?resizew=207)
(1)证明:平面
平面
;
(2)若
,
,设
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f406a4d855d9f492d392b6c31e8fd26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67922f83ef857cf60fe61871cee79f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b190c8d3d7d7d0e6e959e8a52eae90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://img.xkw.com/dksih/QBM/2018/5/31/1957148377391104/1961568540639232/STEM/2bdb0edb41f94a40a2502a58d3d1083d.png?resizew=207)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4a46fbde58e12b1edc038ae9e921722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4cfd870858f2c9bb6e89c2f41b5d653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99bfbda63659d71acd2a4c950ba20692.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/596be055fc960a28d01f32366c2b9490.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7ddd5db68b947a125e6fd226c568d56.png)
您最近一年使用:0次
10 . 已知
是正三棱柱,D是AC中点.
![](https://img.xkw.com/dksih/QBM/2017/12/26/1846806430236672/1850923175116800/STEM/877731c3d743495aa706a47e1d56cdee.png?resizew=207)
(1)证明:
平面
;
(2)若
,求二面角
的度数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b477e54335a3f1e0ab7d0755f9866808.png)
![](https://img.xkw.com/dksih/QBM/2017/12/26/1846806430236672/1850923175116800/STEM/877731c3d743495aa706a47e1d56cdee.png?resizew=207)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0f31c75b24e9f46ac73118fde73d143.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb67086a30d235a04432e8cc0b186d55.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64cb92b02c2f0e7e37837415d7289295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1b13cebe3e46cd2526e63f08f220121.png)
您最近一年使用:0次