名校
1 . 如图1,在平行四边形
中,
,
,
,以对角线
为折痕把
折起,使点
到达图2所示点
的位置,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/2/07743fda-aad7-4d69-93e7-72b1be14b90a.png?resizew=477)
(1)求证:
;
(2)若点
在线段
上,且二面角
的大小为
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d783fe7f3ce673d5d21281174e7a7968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56e703b755cc4fe7ec89af69ec7c93d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f82a30d6b232dc4d8f35d2d6e0e0f42.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/2/07743fda-aad7-4d69-93e7-72b1be14b90a.png?resizew=477)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c65334978b0519b379910dfc4acf8344.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d682fd0344452998187cb6d48de3dd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42020cfacd62b300cad053981bab9e0b.png)
您最近一年使用:0次
2022-05-26更新
|
1210次组卷
|
3卷引用:重庆市实验中学校2021-2022学年高一下学期期末复习(二)数学试题
名校
2 . 已知四棱锥S-ABCD的底面是正方形,
平面ABCD,求证:
![](https://img.xkw.com/dksih/QBM/2022/7/17/3024389976571904/3026770058690560/STEM/02c1d5499b6a4dbd974742f69f1e85f6.png?resizew=207)
(1)
平面SAC;
(2)若
,求点C到平面SBD的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c83f8945042b9c8fb2fbdac9308d62.png)
![](https://img.xkw.com/dksih/QBM/2022/7/17/3024389976571904/3026770058690560/STEM/02c1d5499b6a4dbd974742f69f1e85f6.png?resizew=207)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/410f7a637b09213ab5481441b2f1082f.png)
您最近一年使用:0次
2022-07-20更新
|
1321次组卷
|
3卷引用:重庆市第一中学校2021-2022学年高一下学期期末数学试题
名校
3 . 在四棱锥
中,已知
,
,
,
,
,
,
是
上的点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/105a73d3-a019-41f5-82a9-52d13966c1f5.png?resizew=146)
(1)求证:
底面
;
(2)是否存在点
使得
与平面
所成角的正弦值为
?若存在,求出该点的位置;不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60964e720188e325eb18c9528b1fa95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fd3c2e2199cd4565c05b949bc21fc37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c85aeab3aeaf4367b711da8cde2e8bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2899e607479d8d1c47d954ae9ebb7144.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/105a73d3-a019-41f5-82a9-52d13966c1f5.png?resizew=146)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)是否存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca48c18021e7be4bbb3e95576e1c1b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
您最近一年使用:0次
2022-07-13更新
|
1431次组卷
|
5卷引用:重庆市南开中学校2021-2022学年高二下学期期末数学试题
名校
4 . 已知底面ABCD为菱形的直四棱柱,被平面AEFG所截几何体如图所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/594b9562-51ce-470a-90d9-8686b0d06bec.png?resizew=232)
(1)若
,求证:
;
(2)若
,
,三棱锥GACD的体积为
,直线AF与底面ABCD所成角的正切值为
,求锐二面角
的余弦值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/594b9562-51ce-470a-90d9-8686b0d06bec.png?resizew=232)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4da6d55f36613f4c677d479358fce6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7a67d05f2f5e3e6fd43fb60e8c53d4f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa3f4f259d60ade01bd9bf6632238e39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18483c9c195ecd922772527fa85c0fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b98d08cb05a894f940009f56c74d83c.png)
您最近一年使用:0次
2022-06-07更新
|
1707次组卷
|
4卷引用:重庆市实验中学校2021-2022学年高二下学期期末复习数学试题
名校
解题方法
5 . 如图,在四棱锥
中,
是边长为2的等边三角形,梯形
满足
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2022/5/19/2982704490872832/2995536316547072/STEM/67246644-e9b1-4f9b-a933-931968ec1449.png?resizew=176)
(1)求证:
平面
;
(2)若
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e921f46d90e43f4517c55832b6280f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://img.xkw.com/dksih/QBM/2022/5/19/2982704490872832/2995536316547072/STEM/67246644-e9b1-4f9b-a933-931968ec1449.png?resizew=176)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcfacd208d769d01f1d4ef20313cd869.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cd5c4f8b106d01e0e431078e1a468b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99e77e93fb69b4c0716dde86f52e7406.png)
您最近一年使用:0次
2022-06-06更新
|
935次组卷
|
5卷引用:重庆市实验中学校2021-2022学年高一下学期期末复习(三)数学试题
重庆市实验中学校2021-2022学年高一下学期期末复习(三)数学试题江西省赣州市教育发展联盟2021-2022学年高二下学期第8次联考数学(文)试题(已下线)2022年全国高考甲卷数学(文)试题变式题9-12题辽宁省铁岭市六校协作体2021-2022学年高一下学期期末联考数学试题(已下线)2022年全国高考甲卷数学(文)试题变式题17-20题
6 . 在《九章算术·商功》中,将四个面都是直角三角形的三棱锥称为“鳖臑”.如图,现将一矩形
沿着对角线
将
折成
,且点
在平面
内的投影
在线段
上.已知
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/7/5c4b9662-8fee-4c84-bb04-c49943c59ea9.png?resizew=354)
(1)证明:三棱锥
为鳖臑;
(2)点
到平面
的距离;
(3)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acee03d4bb4667b6c345221b6c9b0fa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c79e56bc6f1db8f446fc5bd34a08865.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/7/5c4b9662-8fee-4c84-bb04-c49943c59ea9.png?resizew=354)
(1)证明:三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08a9ec3b527947cad9caa4537e0cb7e7.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a7ba7cd0c654714c967a900513ba16.png)
您最近一年使用:0次
7 . 如图,正四棱锥
中.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/14/92c340fe-bf62-4e59-9153-22c585c440b7.png?resizew=212)
(1)求证:平面PAC⊥平面PBD;
(2)若
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/14/92c340fe-bf62-4e59-9153-22c585c440b7.png?resizew=212)
(1)求证:平面PAC⊥平面PBD;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9801cabc43c024b9c5fac34b7db5d69b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d7d6e5be7914a224e94a7b7e409a79c.png)
您最近一年使用:0次
2022-07-08更新
|
879次组卷
|
4卷引用:重庆市长寿区2021-2022学年高一下学期期末数学(B)试题
重庆市长寿区2021-2022学年高一下学期期末数学(B)试题(已下线)微专题16 利用传统方法轻松搞定二面角问题(已下线)2023年高考全国乙卷数学(理)真题变式题16-20青海省西宁市2022-2023学年高一下学期期末调研测试数学试题
名校
解题方法
8 . 已知
矩形ABCD所在的平面,且
,M、N分别为AB、PC的中点.求证:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/11/2a20239f-268a-4c7b-8f7c-af20333520bc.png?resizew=224)
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
平面ADP;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f6967901d6c855864df01e7bf7a15c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/11/2a20239f-268a-4c7b-8f7c-af20333520bc.png?resizew=224)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828247a3338571cb0d4ba2a5bf88929c.png)
您最近一年使用:0次
2022-07-10更新
|
475次组卷
|
7卷引用:重庆市荣昌中学校2020-2021学年高二上学期十月月考数学试题
重庆市荣昌中学校2020-2021学年高二上学期十月月考数学试题广东省揭阳第一中学2020-2021学年高一下学期期末数学试题(已下线)专题8.3 空间点、直线、平面之间的位置关系(练)- 2022年高考数学一轮复习讲练测(新教材新高考)广西百色市2021-2022学年高一下学期期末教学质量调研测试数学试题内蒙古赤峰市赤峰第四中学2022-2023学年高一下学期5月月考数学试题甘肃省白银市会宁县第四中学2022-2023学年高一下学期第一次月考数学试题广东省鹤山市第一中学2023-2024学年高二上学期第一阶段考数学试题
解题方法
9 . 正三棱柱
中,
,
,点
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/10/672a192a-baae-4541-b424-bcabcc359cf7.png?resizew=230)
(1)求证:
面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fd676c41d2d644928f014b0fea4689.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1200f6b6773bbe445ccfd4cb6f68f3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/10/672a192a-baae-4541-b424-bcabcc359cf7.png?resizew=230)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78172568aac9805d2ea2d5f742bf80c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5445220e9b81a876e359615859a5a58.png)
您最近一年使用:0次
名校
10 . 如图1,在边长为2的菱形
中,
,点
分别是边
上的点,且
,
.沿
将
翻折到
的位置,连接
,得到如图2所示的五棱锥
.
平面
?证明你的结论;
(2)若平面
平面
,记
,
,试探究:随着
值的变化,二面角
的大小是否改变?如果改变,请说明理由;如果不改变,请求出二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481e426224c3a3ce9bb5a731eed81c40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07d7a3d7f32ce2b4baa1f9346dc7e3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3e06b8bc2571146b241e6028a742e3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12225a1a1eda07908309f8100cc34726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed4c4e8edbd179f3fc38a6653f18c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b99271fe84300da304205280de1b63e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43d865d5674e5c4e15946e45dce8dc2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4180c271831327644dc83240b715b5.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9ab73fd4ddacc0c1524f8d742c7dcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e470e983b075e6442750758e11081e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f342c5e045dba220e9c37b0bb769e4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eb6bf23a5a12e1ba5413594d7b1a57c.png)
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