名校
1 . 已知l,m是两条不同的直线,
,
是两个不同的平面,则下列命题中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
A.若![]() ![]() ![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2023-11-26更新
|
803次组卷
|
10卷引用:四川省2024届高三上学期第四次联考(月考)文科数学试题
四川省2024届高三上学期第四次联考(月考)文科数学试题四川省2024届高三上学期第四次联考(月考)理科数学试题辽宁省名校联考2024届高三上学期12月联合考试数学试题湖北省随州市曾都区第一中学2024届高三上学期12月月考数学试题安徽省皖中名校联盟2024届高三上学期第四次联考数学试题福建省三明市第一中学2024届高三上学期月考二(12月)数学试题吉林省白城市通榆县第一中学校2024届高三上学期第五次质量检测数学试题(已下线)专题06 立体几何 第一讲 立体几何中的证明问题(解密讲义)(已下线)湖北省随州市2024届高三下学期5月模拟数学试题江苏省南通一中2023-2024学年高二年级数学下学期第二次月考(含答案)
解题方法
2 . 如图,已知
垂直于梯形
所在的平面,矩形
的对角线交于点
为
的中点,
.
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
平面
;
(2)在线段
上是否存在一点
,使得
与平面
所成角的大小为
?若存在,求出
的长;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6e2867f32d3f1c3cd36cd3a11a8580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cc6fd59aca9984b6e13354749339823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cf33d73483c93f24cc6a1d76ef22ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4db9b82b67efe45a02fca32bfcf5dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52d10d2e0d8b2152bfc2877c7cfd5169.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/17/5dc2b64e-d36a-45d0-a05a-fc61566854b1.png?resizew=172)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffee8b7eff437080a0936d837ceabe95.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ef796b46e68fe77b117ff0483d2370c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67d01e61dc0042e67b5e8ec8e727c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
您最近一年使用:0次
名校
3 . 如图,三棱柱
的侧棱与底面垂直,
,点
是
的中点.
![](https://img.xkw.com/dksih/QBM/2022/9/11/3064419340214272/3064754319769600/STEM/f52bca12f2c74f7f92f98ac4cde795c9.png?resizew=215)
(1)求证:
;
(2)求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6dfcb0a6104a9be3ee2d8e4c9e5991b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2022/9/11/3064419340214272/3064754319769600/STEM/f52bca12f2c74f7f92f98ac4cde795c9.png?resizew=215)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b4cdc3a083d1263634d510f172dab09.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbc7e774e4ae40c23bf4ceed179230ca.png)
您最近一年使用:0次
2022-09-12更新
|
3850次组卷
|
6卷引用:安徽省合肥市第十中学2022-2023 学年高三上学期学情检测一数学试题
名校
4 . 如图,在四棱锥
中,侧面
是边长为
的正三角形且与底面垂直,底面
是菱形,且
,
为棱
上的动点,且
.
![](https://img.xkw.com/dksih/QBM/2022/9/2/3057811122692096/3057845507432448/STEM/571fea07919a4b8789b6a773132ad9e7.png?resizew=189)
(1)求证:
为直角三角形;
(2)试确定
的值,使得平面
与平面
夹角的余弦值为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fceddfa42f8cac1903c31d822cc1d66e.png)
![](https://img.xkw.com/dksih/QBM/2022/9/2/3057811122692096/3057845507432448/STEM/571fea07919a4b8789b6a773132ad9e7.png?resizew=189)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
(2)试确定
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ddb7c2ca1b6bee86cb24fed02e40da2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
您最近一年使用:0次
2022-09-02更新
|
2387次组卷
|
2卷引用:2023版 湘教版(2019) 选修第二册 过关斩将 第2章 2.4.3 向量与夹角
名校
解题方法
5 . 如图,菱形
的边长为6,对角线交于点
,
,将
沿
折起得到三棱锥
,点
在底面
的投影为点
.
![](https://img.xkw.com/dksih/QBM/2021/4/27/2708935073275904/2710416684392448/STEM/0e27a404-f73a-4824-8f9a-429bbfbf6404.png?resizew=543)
(1)求证:
;
(2)当
为
的重心时,求
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e13c772461aef1d9d715129636739748.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/2021/4/27/2708935073275904/2710416684392448/STEM/0e27a404-f73a-4824-8f9a-429bbfbf6404.png?resizew=543)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
您最近一年使用:0次
2021-04-29更新
|
831次组卷
|
2卷引用:江西省南昌市2021届高三二模数学(文)试题
19-20高一·浙江杭州·期末
名校
解题方法
6 . 如图,矩形
中,
,E为边
的中点,将
沿直线
翻折成
.若M为线段
的中点,则在
翻折过程中,下面四个选项中正确的是______ (填写所有的正确选项)
(1)
是定值
(2)点M在某个球面上运动
(3)存在某个位置,使![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2181c78134c310f746eab44b9124e63b.png)
(4)存在某个位置,使
平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4e4a162f12d12a082b8d8fdd1aeab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa2a83fed9bf4cb09d84a980452e346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/17/49c45696-902c-4380-a480-fc6d28cf58aa.png?resizew=208)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c2f99ac2b6bc91b983628b68a5cd0d.png)
(2)点M在某个球面上运动
(3)存在某个位置,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2181c78134c310f746eab44b9124e63b.png)
(4)存在某个位置,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c70966a318ef8ecf874257f5c5e5db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657dffbd3623b705f871878fbd9df57e.png)
您最近一年使用:0次
2020-11-30更新
|
1076次组卷
|
5卷引用:【新东方】杭州新东方高中数学试卷362
名校
解题方法
7 . 如图,在四边形
中,
,以
为折痕把
折起,使点
到达点
的位置,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/c29e0c78-6351-4c42-9580-dc889bc1491c.png?resizew=141)
(1)证明:
平面
;
(2)若
为
的中点,二面角
等于60°,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aad2d7c7a8177255f745b3b8101b7dc.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/307d38cc7012c328f1f22aa793fe76d7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/c29e0c78-6351-4c42-9580-dc889bc1491c.png?resizew=141)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715cc9ea5e7d80930284ffb117142770.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f35614aff055b98b76ca262f64e629d.png)
您最近一年使用:0次
2020-05-12更新
|
1704次组卷
|
8卷引用:2020届山东省聊城市高三高考模拟(一)数学试题
解题方法
8 . 如图,在三棱柱
中,侧面
底面
,
,
,
分别是棱
,
的中点.求证:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/a918df66-bc78-4c8e-9c3a-6c2d3bc4cc8d.png?resizew=155)
(1)
∥平面
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a2e10a5aebe40a9018d5ee3ade7af8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/a918df66-bc78-4c8e-9c3a-6c2d3bc4cc8d.png?resizew=155)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589c878e789e07e33d65c8a18cf2c58a.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42b6c68ad9b2e22725f3cbf7c1a3f8dc.png)
您最近一年使用:0次
2020-05-01更新
|
738次组卷
|
6卷引用:2020届江苏省南通市基地学校高三下学期第二次大联考数学试题
2020届江苏省南通市基地学校高三下学期第二次大联考数学试题江苏省徐州市2020届高三下学期考前模拟(四模)数学试题(已下线)专题15 空间线面位置关系的证明-2020年高考数学母题题源解密(江苏专版)江苏省徐州市2020届高三(6月份)高考数学考前模拟试题江苏省扬州市高邮市第一中学2020-2021学年高三上学期10月测试数学试题云南省云南师范大学附属镇雄中学2022-2023学年高一下学期5月月考数学试题
名校
9 . 如图,四棱锥P﹣ABCD的底面是梯形.BC∥AD,AB=BC=CD=1,AD=2,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b8f9efada515904b015baa8e2fc1b8c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/bd80ff47-3d74-46af-9200-fe32847a61d5.png?resizew=177)
(Ⅰ)证明;AC⊥BP;
(Ⅱ)求直线AD与平面APC所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96ac79190e1b93c16b5d00a1b516281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b8f9efada515904b015baa8e2fc1b8c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/bd80ff47-3d74-46af-9200-fe32847a61d5.png?resizew=177)
(Ⅰ)证明;AC⊥BP;
(Ⅱ)求直线AD与平面APC所成角的正弦值.
您最近一年使用:0次
2020-03-22更新
|
930次组卷
|
7卷引用:2020届浙江省杭州二中高三上学期返校考试数学试题
2020届浙江省杭州二中高三上学期返校考试数学试题2020届浙江省温州中学高三下学期3月高考模拟测试数学试题福建省三明市2019-2020学年普通高中高三毕业班质量检查A卷(5月联考)理科数学试题福建省三明市2019-2020学年高三(5月份)高考(理科)数学模拟试题(已下线)考点23 运用空间向量解决立体几何问题-2021年高考数学三年真题与两年模拟考点分类解读(新高考地区专用)(已下线)专题19 立体几何综合-2020年高考数学母题题源全揭秘(浙江专版)安徽省滁州市定远县第二中学2022届高三下学期高考模拟检测理科数学试题
解题方法
10 . 如图,EB垂直于菱形ABCD所在平面,且EB=BC=2,∠BAD=60°,点G、H分别为线段CD、DA的中点,M为BE上的动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/f4134a83-f2d8-48a2-a19a-b58415b15228.png?resizew=206)
(Ⅰ)求证:GH⊥DM;
(Ⅱ)当三棱锥D﹣MGH的体积最大时,求三角形MGH的面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/f4134a83-f2d8-48a2-a19a-b58415b15228.png?resizew=206)
(Ⅰ)求证:GH⊥DM;
(Ⅱ)当三棱锥D﹣MGH的体积最大时,求三角形MGH的面积.
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