1 . 如图,在四棱锥中,底面
是边长为
的菱形,
分别是
的中点,
平面
,
,且
.
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67825108ba67284ae24eb4780ba65531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
您最近一年使用:0次
2023-03-24更新
|
258次组卷
|
2卷引用:青海省西宁市大通回族土族自治县2023届高三一模数学(文)试题
2023·全国·模拟预测
名校
解题方法
2 . 如图1,在梯形
中,
,
,
,
,
,线段
的垂直平分线与
交于点
,与
交于点
,现将四边形
沿
折起,使
,
分别到点
,
的位置,得到几何体
,如图2所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/20/5936c8b2-ae86-4b3e-8825-c2f1af0ac12e.png?resizew=273)
(1)判断线段
上是否存在点
,使得平面
平面
,若存在,求出点
的位置;若不存在,请说明理由.
(2)若
,求平面
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/d730ae4307db56b47849c3a19dedfb3f.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/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85227bdb3148e51177d6e26523cbffd6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/20/5936c8b2-ae86-4b3e-8825-c2f1af0ac12e.png?resizew=273)
(1)判断线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/864efbb42ff7e695cb6bc00bbc0a8107.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c262229271a283b8293fe3f4f57f97e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1769cd4d629d8ffb00e8511cfda306b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ed2f4c77adb6528231eecd735512c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c262229271a283b8293fe3f4f57f97e1.png)
您最近一年使用:0次
2023-03-18更新
|
806次组卷
|
6卷引用:2023年普通高等学校招生全国统一考试数学猜题卷(九)
(已下线)2023年普通高等学校招生全国统一考试数学猜题卷(九)黑龙江省哈尔滨市第九中学校2023届高三第四次模拟数学试题四川省成都市树德中学2022-2023学年高二下学期4月月考数学(理)试题(已下线)数学(江苏卷)四川省仁寿第二中学2022-2023学年高二下学期第二次教学质量检测理科数学试题(已下线)单元高难问题01探索性问题(各大名校30题专项训练)-【倍速学习法】2023-2024学年高二数学核心知识点与常见题型通关讲解练(人教A版2019选修第一册)
解题方法
3 . 如图,在四棱锥
中,底面
是边长为
的菱形,
,
,
分别是
,
,
的中点,
平面
,
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/17/c5e54af3-2f07-4ace-9505-188c2698cb67.png?resizew=280)
(1)证明:
平面
;
(2)求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/443ebca856f5c88869a8c3906c6b97b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5db39823f5ae71572164b66ad0a31a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/17/c5e54af3-2f07-4ace-9505-188c2698cb67.png?resizew=280)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67825108ba67284ae24eb4780ba65531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33b7213d99a817bff19bcf740a0697c.png)
您最近一年使用:0次
2023-03-16更新
|
480次组卷
|
2卷引用:青海省西宁市大通回族土族自治县2023届高三一模数学(理)试题
2023·河南·模拟预测
解题方法
4 . 如图,多面体ABCDEF的面ABCD是正方形,其中心为M.平面
平面ABCD,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/27/9342436d-02ad-46a4-93a3-53d1e64bb3db.png?resizew=152)
(1)求证:
平面AEFB;
(2)在
内(包括边界)是否存在一点N,使得
平面CEF?若存在,求点N的轨迹,并求其长度;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc5b246e5d0260af25928b5a3b755eb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1d0d6dc13cf6b6d1a0e0c1d55ad0ba2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/346051345eb1a3cf371e19b3d1dac41a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/27/9342436d-02ad-46a4-93a3-53d1e64bb3db.png?resizew=152)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac0b72906641ed13716cfbce50923282.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e5f8d21c0db7f57ad223a2db0e73bee.png)
您最近一年使用:0次
解题方法
5 . 如图,在直三棱柱
中,
为棱
上靠近
的三等分点,
为棱
的中点,点
在棱
上,且直线
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/27/1ca7bfc4-3977-4ec1-a46b-ce940be1af91.png?resizew=232)
(1)求
的长;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac13ff933d5ab9ba648d7299628a694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdcbfb4d473b0a5a5b07fcdcb9ee3644.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e9c33c356781f0f691d082ee8a32204.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/27/1ca7bfc4-3977-4ec1-a46b-ce940be1af91.png?resizew=232)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d9d4662edaa19665d9890888f6e2e0.png)
您最近一年使用:0次
名校
解题方法
6 . 如图,在直三棱柱
中,
为棱
上靠近
的三等分点,
为棱
的中点,点
在棱
上,且直线
平面
.
![](https://img.xkw.com/dksih/QBM/2022/8/23/3050868189208576/3053039154298880/STEM/4edb939b90ac48f9ab1be3f00fb58dc5.png?resizew=249)
(1)求
的长;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac13ff933d5ab9ba648d7299628a694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69fd379efd21837a27bdaf4e90b99367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e9c33c356781f0f691d082ee8a32204.png)
![](https://img.xkw.com/dksih/QBM/2022/8/23/3050868189208576/3053039154298880/STEM/4edb939b90ac48f9ab1be3f00fb58dc5.png?resizew=249)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b676c6ffdb546ddb77e6740b20e3cdb.png)
您最近一年使用:0次
2022-08-26更新
|
601次组卷
|
3卷引用:顶尖计划河南省2023届高三上学期第一次考试数学理科试题
名校
7 . 如图所示,在平行四边形ABCD中,
,
,E为边AB的中点,将
沿直线DE翻折为
,若F为线段
的中点.在
翻折过程中,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/16/b27da7b6-7973-4ad3-9d53-2118cfe7f717.png?resizew=184)
(1)求证:
平面
;
(2)若二面角
,求
与面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf44b07b0f441100965afb055b0d986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28f4de8802a72516a7cd71fddf524932.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34dbf33492e5223df78dea34a24ae015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/16/b27da7b6-7973-4ad3-9d53-2118cfe7f717.png?resizew=184)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9d32e76582bf550593fdef53e081225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c87014fbb5c656a4f1892dbd88f242.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b58de618e9924e4b24a1f0e0d1543f33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22163a4f67e22f33cbaff2b9a3910002.png)
您最近一年使用:0次
2023-05-11更新
|
3493次组卷
|
14卷引用:安徽省黄山市屯溪第一中学2024届高三第二次模拟考试数学试题(实验班用)
安徽省黄山市屯溪第一中学2024届高三第二次模拟考试数学试题(实验班用)浙江省精诚联盟2021-2022学年高二上学期10月联考数学试题(已下线)期末模拟题(二)-2021-2022学年高二数学同步单元AB卷 (人教A版2019选择性必修第一册+第二册,浙江专用)浙江省宁波市奉化区2021-2022学年高一下学期期末数学试题浙江省温州市苍南县金乡卫城中学2022-2023学年高二上学期10月第一次月考数学试题浙江省宁波市余姚中学2022-2023学年高一下学期期中数学试题河南省安阳市第一中学2022-2023学年高一下学期5月月考数学试题江苏省常州市第一中学2022-2023学年高一下学期6月期末数学试题江苏省扬州中学2022-2023学年高一下学期5月月考数学试题(已下线)第04讲 利用几何法解决空间角和距离19种常见考法归类(4)山东省济南市莱芜区济南市莱芜第一中学2022-2023学年高一下学期6月月考数学试题四川省成都市成都市第七中学2022-2023学年高一下学期6月月考数学试题专题12空间中直线、平面的平行与垂直关系(解答题)(已下线)专题15 立体几何解答题全归类(练习)
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:河南省新乡市2022-2023学年高三上学期第一次模拟考试文科数学试题
名校
解题方法
9 . 在正方体
,
,点F为
中点,点E为
中点
(1)若G点是正方形
内的动点(含边界),G点运动时,始终保持
,求G点运动轨迹的长度.
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
(1)若G点是正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11cf271283ae2f196495c966a98c83ce.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e516121599c9fcc528121c00afcf52fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e2da608b66c9aee03e2503388ba4fd.png)
您最近一年使用:0次
2022-11-23更新
|
361次组卷
|
2卷引用:湖南省郴州市原创试题评比参评2022届高三高考模拟数学试题(安仁一中命制)
名校
解题方法
10 . 在长方体
中,已知
,E为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/67fe8b2d-bdc9-4be2-adef-f298ed2547b8.png?resizew=152)
(1)在线段
上是否存在点F,使得平面
平面
?若存在,请加以证明;若不存在,请说明理由;
(2)设
,点G在
上且满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89a5a1abb6d0c0a4829759ca7b8912c4.png)
,求
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff7ddbb49c644bf06ccbad885ba2c84a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62974e32fac0b8857d855464877fa071.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/67fe8b2d-bdc9-4be2-adef-f298ed2547b8.png?resizew=152)
(1)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e54038fa9518fc9a3aa2cb97a74196.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/033d55114db68c273ab3b8b4e4b95fc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88487c4c5a2ab5965089a71d8bc2377a.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ea10159a3ebf75567a4c469937b8c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e17230625e72d3a9c6d72ff61019ff61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89a5a1abb6d0c0a4829759ca7b8912c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b88e7cb71b8bad003650863e98ed306.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a47614ea5ee81059bf3352f38782ac00.png)
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2022-10-23更新
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11卷引用:湖南省2021届高三数学模拟试题(黑卷)
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