名校
1 . 如图,四棱锥
中,底面
是矩形,
,
,且侧面
底面
,侧面
底面
,点F是PB的中点,动点E在边BC上移动,且
.
(1)证明:
底面
;
(2)当点E在BC边上移动,使二面角
为
时,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13ff5ff92f2505a933d0213039f4c014.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c17c0e8c2d7a6d19e171d6c9aa286de5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbb24da8242d2c143ddbd9bbdc7dda87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/725ce6635389e73a507383151b62e898.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/9/f32c763e-04af-475f-8f2f-eb38bd75fb41.png?resizew=150)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)当点E在BC边上移动,使二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37de2f75ae1fa56a52f1e52d624c6dd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ee9a87e271f046855634f1347cc1cde.png)
您最近一年使用:0次
名校
2 . 如图1,在边长为2的正方形
中,
,
分别是
,
的中点,将
,
,
分别沿
,
,
折起,使
重合于点
,得到如图2所示的三棱锥
,有下列判断:①
平面
;②
在面
的射影为
的垂心;③三棱锥
的外接球体积为
;④二面角
的余弦值为
.其中正确的个数是( )
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5df7626240940eb340420a605e95aeee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2ea13010e2399194be2a681310543e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16fd1bc6147d69777b26a35d48522f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d246f9eceab371ebf47a47c2f11a4ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16fd1bc6147d69777b26a35d48522f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefdcd39676298f214654051fc51ba92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb3d49759594355505caaf42691e5363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/24/70b6a910-1e57-459b-b15a-f5b2565aeb90.png?resizew=327)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
3 . 如图所示,在四棱锥
中,
平面
,
是线段
的中垂线,
与
交于点
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d1f1331818468099accbf5d84a12c1.png)
(1)证明:平面
平面
;
(2)求点B到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d1f1331818468099accbf5d84a12c1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/24/9a55095a-4750-4943-a4a7-8e18febdacf9.png?resizew=150)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04c222223dae9ef27d4c132534d9848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求点B到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
您最近一年使用:0次
名校
解题方法
4 . 在正方体
中,E为棱
的中点,底面对角线AC与BD相交于点O.求证:
平面
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923d409630f5331cf8e85fb6c584e31b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb8c3e6d8e2843a2783a409e130bc0a.png)
您最近一年使用:0次
2023-12-11更新
|
921次组卷
|
7卷引用:四川省乐山沫若中学2020-2021学年高二下学期入学考试数学(文科)试题
四川省乐山沫若中学2020-2021学年高二下学期入学考试数学(文科)试题陕西省西安市周至县第二中学2020-2021学年高一上学期期末数学试题天津市滨海新区大港太平村中学2019-2020学年高一下学期期末数学试题陕西省延安市新区高级中学2021-2022学年高一上学期期末数学试题(已下线)13.2.3 直线与平面的位置关系(1)-【帮课堂】(苏教版2019必修第二册)(已下线)第十三章 立体几何初步(知识归纳+题型突破)(2)-单元速记·巧练(苏教版2019必修第二册)(已下线)专题3.6空间直线、平面的垂直-重难点突破及混淆易错规避(人教A版2019必修第二册)
名校
5 . 如图①,在等腰三角形
中,
,
,
,
分别在边
上,且满足
. 将
沿直线
折起到
的位置,连接
,
,得到如图②所示的四棱锥
,点
满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/5f1489b2-70ad-49cb-b12e-db5503a8ed58.png?resizew=451)
(1)证明:
平面
;
(2)当
时,求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94911ca2a27e4a36c55cdd44a74a9a5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43eaef897e016a81cba403ab51e49e09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a2b15bc019d36ef9892d2a6466a300d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cff7399ecc698e2fb415147c96d0d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e7cedc39297d66dbb177f2a1f6bee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcbddb214eeac680c06e21f74a561d07.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/5f1489b2-70ad-49cb-b12e-db5503a8ed58.png?resizew=451)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a2b5cfae407016cad45bbdefea05833.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb88289c2aed70bade0bddea6d1dd72b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
您最近一年使用:0次
名校
解题方法
6 . 图甲所示的平面五边形
中,
,
,
,
,
,现将图甲所示中的
沿
边折起,使平面
平面
得如图乙所示的四棱锥
.在如图乙所示中.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/358fe606-70e1-4ecc-81c6-99fc3d485376.png?resizew=301)
(1)求证:
平面
.
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1e3a43d0fa18f6c0888ba804d5b329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e4e619da064751e750afca7d1244d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5a7b519121b3b785d95f32e5b4fbd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b6e3e900a2d5c052d719b0d4f823c8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/358fe606-70e1-4ecc-81c6-99fc3d485376.png?resizew=301)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c482ee1668a59ca21f3ae8b6bad58eae.png)
您最近一年使用:0次
2023-02-25更新
|
272次组卷
|
3卷引用:四川省成都市成都市石室天府中学2020-2021学年高二下学期5月月考数学文科试题
名校
7 . 如图,在四棱锥P﹣ABCD中,底面ABCD为平行四边形,△PCD为等边三角形,平面PAC⊥平面PCD,PA⊥CD,CD=2,AD=3.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/14/eeffd8f4-29be-4b12-a167-398650faa795.png?resizew=158)
(1)求证:PA⊥平面PCD;
(2)求直线AD与平面PAC所成角的正弦值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/14/eeffd8f4-29be-4b12-a167-398650faa795.png?resizew=158)
(1)求证:PA⊥平面PCD;
(2)求直线AD与平面PAC所成角的正弦值.
您最近一年使用:0次
2022-08-13更新
|
1768次组卷
|
9卷引用:四川省绵阳南山中学2021-2022学年高二上学期入学考试数学试卷
四川省绵阳南山中学2021-2022学年高二上学期入学考试数学试卷四川省绵阳南山中学2021-2022学年高二上学期入学考试数学试题河南省许昌市2021-2022学年高一下学期期末数学文科试题(已下线)第04讲 空间直线、平面的垂直 (练)江苏省扬州中学2022-2023学年高二上学期开学质量检测数学试题(已下线)专题4 空间几何体的角度运算(基础版)(已下线)第04讲 空间直线、平面的垂直 (高频考点—精讲)-2(已下线)第32讲直线与平面垂直1安徽省阜阳汇文中学2022-2023学年高一下学期第三次月考数学试题
名校
8 . 如图,四棱锥
中,底面ABCD是直角梯形,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/04e1bf90-1acb-4fbd-ad10-c127bda39e72.png?resizew=186)
(1)求证:
平面ABCD;
(2)设
,当平面PAM与平面PBD夹角的余弦值为
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d911eda6c5f21fc1bbbf505ec5b4a34b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a69a02987e843691859d1b36f20a57f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f9425630dcfe5a824c44904d4f71e13.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/04e1bf90-1acb-4fbd-ad10-c127bda39e72.png?resizew=186)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/399cf3d3c84b9ba244d026e35dbd1880.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e468f168f3657d84d44be5eb89a62d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2022-11-16更新
|
1743次组卷
|
11卷引用:四川省华蓥中学2021届高三高考数学(理)仿真试题
四川省华蓥中学2021届高三高考数学(理)仿真试题湖北省七市(州)教研协作体2021届高三下学期3月联考数学试题(已下线)2021年高考数学押题预测卷(新高考卷)01湖南省株洲市第二中学2021-2022学年高二下学期“同济大学”杯数理化联赛数学试题(已下线)三轮冲刺卷06-【赢在高考·黄金20卷】备战2022年高考数学模拟卷(新高考专用)江苏省连云港市灌南高级中学、灌云高级中学2022-2023学年高三上学期10月联考数学试题云南省大理、丽江、怒江2023届高中毕业生第一次复习统一检测数学试题江西省临川第一中学暨临川实验学校2022-2023学年高地二上学期11月月考数学试题(已下线)专题8-2 立体几何中的角和距离问题(含探索性问题)-3(已下线)模块十一 立体几何-2湖北省恩施州巴东县第一高级中学2023-2024学年高二上学期第三次月考数学试题
解题方法
9 . 如图,已知直三棱柱
中,D,E,F分别为AC,
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/8ab0e165-a831-4131-a12c-7353ba064d71.png?resizew=158)
(1)求证:
平面ABC;
(2)若△ABC为等腰直角三角形,∠ABC=90°,且
.求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/8ab0e165-a831-4131-a12c-7353ba064d71.png?resizew=158)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a407b262c22419f73396170ecdc849.png)
(2)若△ABC为等腰直角三角形,∠ABC=90°,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d289a52b00154f78031af90afa02135.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047da2786ecd6c3b0248908e72593c66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf9628142422a4884bd59538da6d312.png)
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10 . 如图,已知二面角
,且
,
,
,C,D是垂足,平面PCD与AB交于点H.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/29/a178b3d6-6f06-4bbe-91d1-04b5a60fa5d1.png?resizew=245)
(1)求证:AB⊥平面PCD;
(2)若PC=PD=CD=1,试求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ce3f859c6b9a0cfc98bdf5b3d0f395.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74742135157ce66703f899d52748b78b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d9105f139c37c74dcab39b136c267eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf90b31eb064a12d3ed6bffaaccc8737.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/29/a178b3d6-6f06-4bbe-91d1-04b5a60fa5d1.png?resizew=245)
(1)求证:AB⊥平面PCD;
(2)若PC=PD=CD=1,试求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ce3f859c6b9a0cfc98bdf5b3d0f395.png)
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