解题方法
1 . 如图,在正四棱锥
中,点E,F分别在棱PB,PD上,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f5e0b8070ef28816c417b348fb5fab.png)
.
![](https://img.xkw.com/dksih/QBM/2022/5/20/2983485856006144/2996124922609664/STEM/f4ab32c9-6413-4a92-ba3a-11cb291517e1.png?resizew=267)
(1)证明:
平面PAC;
(2)当
时,请问在棱PC上是否存在点M,使得
∥平面MEF?若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f5e0b8070ef28816c417b348fb5fab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bee2973a5b77d5324d68c4ba2a4060b.png)
![](https://img.xkw.com/dksih/QBM/2022/5/20/2983485856006144/2996124922609664/STEM/f4ab32c9-6413-4a92-ba3a-11cb291517e1.png?resizew=267)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a2a34b4317deffa40ba34e269c2b81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d4838797cff70efabc1e8c1c005e3d6.png)
您最近一年使用:0次
名校
解题方法
2 . 如图所示几何体中,平面
平面
,△PAD是直角三角形,
,四边形
是直角梯形,
,
, 且
,PA=AB=2.
![](https://img.xkw.com/dksih/QBM/2022/5/20/2983530540892160/2996090784997376/STEM/a7c5feba-9aa3-44ab-81a1-a42c398ec331.png?resizew=211)
(1)试在AB上确定一点E,使得平面
平面
,并说明理由;
(2)求证:
平面
;
(3)在线段
上是否存在点
,使得
,若存在,求
的值;若不存在,请说明理由.
![](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/85c5ace226a547e68702df548b08cb5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5001c688de2c2fb3a95a89e743e39504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ab3e77f23abd20f637b70e6b1125d30.png)
![](https://img.xkw.com/dksih/QBM/2022/5/20/2983530540892160/2996090784997376/STEM/a7c5feba-9aa3-44ab-81a1-a42c398ec331.png?resizew=211)
(1)试在AB上确定一点E,使得平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e68df194252bc68d1ebe51eb6c0f83d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee188333e1fa99417aede565c6a4a136.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/230773e239052ba228224f9a81cbb2b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e98eb6db9c24321307c445af89a855.png)
(3)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf702adb116c1e46569eb7050d029f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed46a014ece6a0830c7c8b8deb2c56e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8305c4ffbf876642440c3d28e91e9f.png)
您最近一年使用:0次
2022-06-07更新
|
679次组卷
|
2卷引用:福建省三明市四地四校2021-2022学年高一下学期期中联考数学试题
名校
解题方法
3 . 《九章算术》中将底面为直角三角形且侧棱垂直于底面的三棱柱称为“堑堵”;底面为矩形,一条侧棱垂直于底面的四棱锥称之为“阳马”;四个面均为直角三角形的四面体称为“鳖臑”.如图在堑堵ABC−A1B1C1中,AC⊥BC,且AA1═AB═2.下列说法正确的是( )
A.四棱锥![]() ![]() |
B.若平面![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
C.四棱锥![]() ![]() |
D.若![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次
2022-06-07更新
|
1773次组卷
|
8卷引用:福建省三明市四地四校2021-2022学年高一下学期期中联考数学试题
福建省三明市四地四校2021-2022学年高一下学期期中联考数学试题(已下线)第02讲 玩转立体几何中的角度、体积、距离问题-2022年暑假高一升高二数学衔接知识自学讲义(人教A版2019)辽宁省丹东市凤城市第一中学2021-2022学年高一下学期6月月考数学试题辽宁省六校2022-2023学年高二上学期期初考试数学试题(已下线)2023年四省联考平行卷湖南省娄底市新化县第一中学2022-2023学年高二上学期期末线上测试数学试题(已下线)专题1 鳖臑阳马 巧用性质 练(已下线)广东省深圳市深圳中学2024届高三二轮四阶测试数学试题
名校
解题方法
4 . 如图,△ABC是等边三角形,EA⊥平面ABC,
,
,F为BE的中点.
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987968370409472/2995471762808832/STEM/1b805987-a397-424e-9cb5-4056adcfc43d.png?resizew=137)
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
平面ABC;
(2)证明:AF⊥平面BDE.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1975679e668da558994a1b999f4f5394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ed9e594c8562b84cf1e0e18b272e45.png)
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987968370409472/2995471762808832/STEM/1b805987-a397-424e-9cb5-4056adcfc43d.png?resizew=137)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
(2)证明:AF⊥平面BDE.
您最近一年使用:0次
2022-06-06更新
|
777次组卷
|
4卷引用:福建省厦门第一中学2021-2022学年高一5月月考第二次阶段核心素养检测数学试题
名校
解题方法
5 . 如图,在四棱锥
中,底面
是矩形,
平面
,
,
,且
.
![](https://img.xkw.com/dksih/QBM/2022/6/2/2992598997565440/2995465896140800/STEM/2f5de7e4-1879-480e-8a41-6778a8918e39.png?resizew=236)
(1)求证:平面
平面
;
(2)若
,
,求直线PB与平面ADP所成角的正弦值.
![](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/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4d41989d897ddb0fe7aa59f3beaabf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e2267c84394668eff2e9f5918de4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50ee682e84c4868ecc516f8b48ad6844.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76421910ec10ba326618eded5229a740.png)
![](https://img.xkw.com/dksih/QBM/2022/6/2/2992598997565440/2995465896140800/STEM/2f5de7e4-1879-480e-8a41-6778a8918e39.png?resizew=236)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
您最近一年使用:0次
2022-06-06更新
|
1065次组卷
|
9卷引用:福建省福州第三中学2023届高三上学期第三次质量检测数学试题
福建省福州第三中学2023届高三上学期第三次质量检测数学试题海南省2022届高三上学期学业水平诊断一数学试题(已下线)解密10 空间向量与立体几何(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)广西贺州市昭平县昭平中学2021-2022学年高二下学期第二次月考数学(理)试题(已下线)2022年全国高考乙卷数学(理)试题变式题9-12题(已下线)2022年全国高考乙卷数学(理)试题变式题17-20题(已下线)7.3 空间角(精讲)海南省2023届高三高考全真模拟(一)数学试题辽宁省六校2022-2023学年高三上学期期中数学试题
名校
解题方法
6 . 如图,在矩形ABCD中,
,点M为边AB的中点.以CM为折痕把BCM折起,使点B到达点P的位置,使得
,连接PA,PB,PD.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/20/e6ab32ce-954f-40ae-ab9d-42ba25869a8c.png?resizew=205)
(1)证明:平面PMC⊥平面AMCD;
(2)求直线PC与平面PAD所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4e4a162f12d12a082b8d8fdd1aeab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619ccc1860b290ead7a9387c928d522c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/20/e6ab32ce-954f-40ae-ab9d-42ba25869a8c.png?resizew=205)
(1)证明:平面PMC⊥平面AMCD;
(2)求直线PC与平面PAD所成角的正弦值.
您最近一年使用:0次
2022-05-31更新
|
391次组卷
|
2卷引用:福建省厦门外国语学校2021-2022学年高二下学期数学期末模拟试题(3)
解题方法
7 . 如图,
是圆O的直径,
圆O所在的平面,C为圆周上一点,D为线段
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/24126ccf-4246-4b2f-9f10-bd9c5ff4555f.png?resizew=250)
(1)证明:平面
平面
.
(2)若G为
的中点,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/400a5a5bdb1785900025b082122fb391.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/19/24126ccf-4246-4b2f-9f10-bd9c5ff4555f.png?resizew=250)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)若G为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a2bb1f07a1709685fca0955196f32d1.png)
您最近一年使用:0次
名校
解题方法
8 . 如图,在四棱锥
中,
平面PAD,
且
,
,M为PC中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/f51fcb09-4bda-49f6-b6fa-38662dedc871.png?resizew=193)
(1)求证:
平面PAD;
(2)求证:
平面PCD.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a98c8e36238ad90378e724466fcb6023.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64f1161e0345b3646c71365430dccbb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/036de574712cad14bddadf6653c7e714.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/f51fcb09-4bda-49f6-b6fa-38662dedc871.png?resizew=193)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f369bec2d5682bf6b8b317a08aff546.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
您最近一年使用:0次
2022-05-26更新
|
936次组卷
|
5卷引用:福建省福州第四中学2021-2022学年高一下学期期末检测数学试题
福建省福州第四中学2021-2022学年高一下学期期末检测数学试题辽宁省沈阳市东北育才学校2021-2022学年高一下学期期中考试数学试题福建省福州第二中学2022-2023学年高一下学期第四学段(期末)考试数学试题(已下线)8.5.2 直线与平面平行(分层作业)-【上好课】2022-2023学年高一数学同步备课系列(人教A版2019必修第二册)(已下线)高一下期末真题精选(基础60题60个考点专练)
名校
9 . 如图1,正方形ABCD中,E,F分别为边BC,AD的中点,将四边形EFDC沿直线EF折起,使得平面
平面ABEF.如图2,点M,N分别满足
,
.
![](https://img.xkw.com/dksih/QBM/2022/5/19/2982337126260736/2984282999488512/STEM/bf8fa4ef-f995-41d7-aa2d-8cf8e06a94aa.png?resizew=370)
(1)求证:
平面BMN;
(2)求平面AFM与平面BMN夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b9b8345fc4d52e1a9377cf98b429be6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7735eeeba8e3fe00e3fb401ffe449ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9845a524b0eecc42b50b3760d0fb4976.png)
![](https://img.xkw.com/dksih/QBM/2022/5/19/2982337126260736/2984282999488512/STEM/bf8fa4ef-f995-41d7-aa2d-8cf8e06a94aa.png?resizew=370)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c7c261740ac2ae26715e1298ca278a2.png)
(2)求平面AFM与平面BMN夹角的余弦值.
您最近一年使用:0次
2022-05-21更新
|
724次组卷
|
3卷引用:福建省厦门第一中学2021-2022学年高二6月适应性练习数学试题
名校
10 . 如图,在四边形ABCD中,BC=CD,BC⊥CD,AD⊥BD,以BD为折痕把△ABD折起,使点A到达点P的位置,且PC⊥BC.
![](https://img.xkw.com/dksih/QBM/2022/5/15/2980094247780352/2981218525560832/STEM/b80eff73-f0a1-4de6-90da-6b8a30fa596c.png?resizew=182)
(1)证明:PD⊥平面BCD;
(2)若M为PB的中点,二面角P﹣BC﹣D等于60°,求直线PC与平面MCD所成角的正弦值.
![](https://img.xkw.com/dksih/QBM/2022/5/15/2980094247780352/2981218525560832/STEM/b80eff73-f0a1-4de6-90da-6b8a30fa596c.png?resizew=182)
(1)证明:PD⊥平面BCD;
(2)若M为PB的中点,二面角P﹣BC﹣D等于60°,求直线PC与平面MCD所成角的正弦值.
您最近一年使用:0次
2022-05-17更新
|
1161次组卷
|
6卷引用:福建省龙岩第一中学2021-2022学年高二下学期第二次月考数学试题
福建省龙岩第一中学2021-2022学年高二下学期第二次月考数学试题辽宁省大连育明高级中学2022届高三第一次模拟考试数学试卷(已下线)2022年全国高考甲卷数学(理)试题变式题9-12题(已下线)2022年全国高考甲卷数学(理)试题变式题9-12题(已下线)2022年全国高考甲卷数学(理)试题变式题17-20题福建省泉州市第九中学2022-2023学年高二下学期数学月考巩固试题