如图,四棱锥
中,底面ABCD是矩形,
平面ABCD,E为PD的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/5cf18381-ed89-45c2-8afe-f54ec914e1a6.png?resizew=174)
(1)证明:
平面ACE;
(2)设
,
,直线PB与平面ABCD所成的角为
,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/5cf18381-ed89-45c2-8afe-f54ec914e1a6.png?resizew=174)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30067b7b236d17af8a462f96a58d11bd.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc532cfe64300cb3da9e04a307c957a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d783fe7f3ce673d5d21281174e7a7968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
20-21高三·湖南·对口高考 查看更多[14]
2021年湖南省普通高等学校对口招生考试数学试题(已下线)考向30 空间几何体的结构特征、直观图与体积(重点)-备战2022年高考数学一轮复习考点微专题(新高考地区专用)(已下线)考向22 空间几何体-备战2022年高考数学一轮复习考点微专题(上海专用)(已下线)第11讲 直线与平面、平面与平面的位置关系-【寒假自学课】2022年高一数学寒假精品课(苏教版2019必修第二册)(已下线)押新高考第19题 立体几何-备战2022年高考数学临考题号押题(新高考专用)(已下线)解密09 立体几何初步(分层训练)-【高频考点解密】2022年高考数学二轮复习讲义+分层训练(浙江专用)(已下线)第6讲 立体几何新疆乌鲁木齐市第一中学2021-2022学年高一下学期期末考试数学试题四川省遂宁市绿然国际学校2022届高考数学(文科)二诊模拟试题(已下线)8.5.1-8.5.2 直线与直线、直线与平面平行(1)-2022-2023学年高一数学《考点·题型·技巧》精讲与精练高分突破系列(人教A版2019必修第二册)(已下线)模块二 专题5《立体几何初步》单元检测篇 A基础卷(北师大版)(已下线)模块二 专题3《立体几何初步》单元检测篇 A基础卷(已下线)模块二 专题5《立体几何初步》单元检测篇 A基础卷(人教B)内蒙古包头市第四中学2022届高三下学期校内三模理科数学试题
更新时间:2021-08-17 14:03:23
|
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解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】如图,
是等腰直角三角形,
,四边形ABCM是直角梯形,
,
,且
,平面ADM⊥平面ABCM.
(1)求证:
;
(2)若点E是线段DB上的一动点,问点E在何位置时,三棱锥
的体积为
?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f9fba8a4098c1a0515286eb8d616dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae17686725a5ecc001c809cfc35d1429.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4685bc53d11be0f30476c377d76561.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1801ddbdf49f88c1800b422f108f0ec7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/27/c7fc375c-5050-43a8-905c-779f02f7cd86.png?resizew=156)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/804c0e2a375b5f4ff1c420532968efc3.png)
(2)若点E是线段DB上的一动点,问点E在何位置时,三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6fea520be511f0bca09d795851b0fa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e27a93cab4f52dcd428230d68bde791c.png)
您最近一年使用:0次
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名校
解题方法
【推荐2】在边长为a的正方形
中,E,F分别为
,
的中点,M、N分别为
、
的中点,现沿
、
、
折叠,使B、C、D三点重合,构成一个三棱锥
,如图所示.
中,求证:
;
(2)求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3d72be0be26b898bc07172549a63757.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3d72be0be26b898bc07172549a63757.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a0b29cc24e75be59cbaa5c60a4b4c6e.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7668ccfddadef10dba0ca9572e5b1c5.png)
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解答题-问答题
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适中
(0.65)
【推荐1】如图,在四棱锥
中,PD⊥平面ABCD,四边形ABCD是矩形,点E是PC的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/00ae08e3-509e-4d0a-b886-a134d78df889.png?resizew=154)
(1)求异面直线PA与DE所成角的余弦值;
(2)证明:PA
平面BDE;
(3)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69c7dd958b8eade2414de5156f305234.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/00ae08e3-509e-4d0a-b886-a134d78df889.png?resizew=154)
(1)求异面直线PA与DE所成角的余弦值;
(2)证明:PA
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d682fd0344452998187cb6d48de3dd1.png)
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解答题-证明题
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适中
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【推荐2】如图,在多面体
中,四边形
是矩形,
,
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/5029b438-ce82-4f41-9b46-5c108519fa42.png?resizew=153)
(1)若
点是
的中点,求证:
平面
;
(2)求证:平面
平面
;
(3)若
,求直线
与平面
成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/462caf109f6578fc7e9269fc911dbb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2e66a09e27d23b44950bc32be100806.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c674dc5024374f53920947c4cf4baf11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/5029b438-ce82-4f41-9b46-5c108519fa42.png?resizew=153)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52aef9d1132740cff16178519f2e3d74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97a9b32570d553161be04d13954e92a1.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/630675e0bd82419bc787b557181303d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d68ec6b93c40e26602f5de3ed9623f35.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/665c3e4362820ca1ee9442a511f4638d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
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解答题-证明题
|
适中
(0.65)
【推荐1】如图,
是平面
的斜线,
为斜足
平面
,
为垂足,
是平面
上的一条直线,
于点
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/0bb035a7-25c6-44dd-b8e1-4e49cc6d77f0.png?resizew=132)
(1)求证:
平面
;
(2)求
和平面
所成的角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce03b310edce42191f9fa75a1c909ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6244ad33aac326b29e5111c97820ff6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df0c656386b2889c4556d8309508463.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/0bb035a7-25c6-44dd-b8e1-4e49cc6d77f0.png?resizew=132)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3781cfd1cef95fc1c157c9e81ddbf5e.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,在四棱锥
中,底面
是边长为2的菱形,
,
平面
,
.
平面
;
(2)设P为
上的一个动点,是否存在点P使得
与平面
所成角为30°,若存在,求
,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.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/10c83f8945042b9c8fb2fbdac9308d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1804c3641953c30ccf750504eff6577.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78307cd417504554a4e2276fe24d1162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5000fea066102e62cf2128ccbbd2b3e3.png)
(2)设P为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602d0265aa2b89076b0cff90853f7cfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d923a338dd2d2e29336b42574d38448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
您最近一年使用:0次