名校
解题方法
1 . 如图,已知多面体EABCDF的底面ABCD是边长为2的正方形,
,
,且
.
(1)记线段
的中点为
,在平面
内过点
作一条直线与平面
平行,要求保留作图痕迹,但不要求证明;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e04eb87d1aa3784c08f3239d4ff99e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a060f4fc2c8034b08c77c065f9e125d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba1316f4183e8854d38283b716e2ba1b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/18/163f8856-84f6-45d9-95fa-fa04563ea83d.png?resizew=139)
(1)记线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f636f76d550dfb593a25eb680cff556.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f636f76d550dfb593a25eb680cff556.png)
您最近一年使用:0次
2023-06-15更新
|
597次组卷
|
9卷引用:广西桂林市桂林中学2017届高三5月全程模拟考试数学(理)试题
广西桂林市桂林中学2017届高三5月全程模拟考试数学(理)试题山西省太原市第五中学2017届高三第二次模拟考试(5月) 数学(理)试题辽宁省鞍山市第一中学2018届高三上学期第二次模拟考试(期中)数学(理)试题天津市实验中学2018届高三上学期第二次模拟数学(理)试题江西省临川二中、新余四中2018届高三1月联合考试数学(理)试题安徽省舒城中学2023届高三仿真模拟卷(三)数学试题(已下线)重难点突破06 立体几何解答题最全归纳总结(九大题型)-2(已下线)专题15 立体几何解答题全归类(9大核心考点)(讲义)-1(已下线)重难点12 立体几何必考经典解答题全归类【九大题型】
名校
解题方法
2 . 如图所示,在直三棱柱
中,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/11/23/2857396197957632/2861928964218880/STEM/bedfd776-6b69-46db-9ab6-acc8eea801fe.png?resizew=240)
(1)若D是棱
的中点,E是棱
的中点.证明:
平面
;
(2)证明:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db57eca2a7cbd91bc57372592580a76.png)
![](https://img.xkw.com/dksih/QBM/2021/11/23/2857396197957632/2861928964218880/STEM/bedfd776-6b69-46db-9ab6-acc8eea801fe.png?resizew=240)
(1)若D是棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78172568aac9805d2ea2d5f742bf80c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b7903de4be7d5dc1175cfbf6e8da9f.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26d8a9d64ad3c8cba28840b41ed7837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b7903de4be7d5dc1175cfbf6e8da9f.png)
您最近一年使用:0次
2021-11-29更新
|
361次组卷
|
2卷引用:广西浦北中学2021-2022学年高二上学期期中考试数学(理)试题
名校
3 . 如图,在几何体
中,底面
是边长为2的正三角形,
平面
,
,且
是
的中点.
![](https://img.xkw.com/dksih/QBM/2021/11/12/2849700677296128/2854736996712448/STEM/c8ac534f-7086-40a8-9d0c-b0124277f4b3.png?resizew=216)
(1)求证:
平面
;
(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/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36723bd074d43a8c98d9bd416020042c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e7bcb2d8a6172fe504c2c63e3ebc1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2021/11/12/2849700677296128/2854736996712448/STEM/c8ac534f-7086-40a8-9d0c-b0124277f4b3.png?resizew=216)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/932a04304f2d4975955d4baabb2deeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee3d16c7bd3fa91ce2848206816eec2.png)
您最近一年使用:0次
2021-11-19更新
|
564次组卷
|
6卷引用:广西贺州市2021-2022学年高二上学期全面质量检测数学(理)试题
解题方法
4 . 如图,在长方体
中,
,M,N分别为
,
的中点,AC与BD交于点O.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/785eb662-0bd7-48da-b3ce-7b3e05ad2d5d.png?resizew=195)
(1)证明:
平面
;
(2)证明:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0159041367660e750ace61115dc9b844.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/785eb662-0bd7-48da-b3ce-7b3e05ad2d5d.png?resizew=195)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eaa5e336f830a3e5cd60ff7a756f3ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73845d4d663b3de0b281611fe2c762fe.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e5981445b6f2a6c58974158d96a4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73845d4d663b3de0b281611fe2c762fe.png)
您最近一年使用:0次
5 . 如图,四棱锥
中,侧面PAD为等边三角形且垂直于底面ABCD,
,
.
![](https://img.xkw.com/dksih/QBM/2021/11/2/2842459811209216/2849753003761664/STEM/77092bd5595c4c06bbf9ed9c901da20a.png?resizew=211)
(1)证明:直线
平面PAD;
(2)若
,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78aafccd397e9c88a567abf4993d40f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7af36689a2d2a5f999b3b5859a3c9faf.png)
![](https://img.xkw.com/dksih/QBM/2021/11/2/2842459811209216/2849753003761664/STEM/77092bd5595c4c06bbf9ed9c901da20a.png?resizew=211)
(1)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08f8b463fcecf0a757f386db56e074d9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41d5a42a8509e15a0dca186f06be73dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
您最近一年使用:0次
2021-11-12更新
|
450次组卷
|
2卷引用:广西罗城仫佬族自治县高级中学2021-2022学年高二上学期开学检测数学试题
名校
解题方法
6 . 如图,在正三棱柱
中,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2021/10/20/2833275760254976/2833296692150272/STEM/7d495800-737c-4773-9ec9-9e6fd1874217.png?resizew=250)
(1)证明:
平面
;
(2)已知
,
,求多面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.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/2021/10/20/2833275760254976/2833296692150272/STEM/7d495800-737c-4773-9ec9-9e6fd1874217.png?resizew=250)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd597851c0db4e4de4769e10e09383b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bca84ad86c648d3bb20c8909c8da3f.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e862713d078c4f06ec1f15ccd6f5a1f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d72d3b73315c93ed0cd16fa023677152.png)
您最近一年使用:0次
2021-10-20更新
|
477次组卷
|
2卷引用:广西钟山县钟山中学2021-2022学年高二上学期第三次(12月)月考数学试题
解题方法
7 . 如图,在四棱锥
中,底面
为矩形,
平面
,
,
为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/07855c7d-24eb-4423-8e07-beee009bd930.png?resizew=166)
(1)证明:
平面
.
(2)证明:
平面
.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f6967901d6c855864df01e7bf7a15c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/07855c7d-24eb-4423-8e07-beee009bd930.png?resizew=166)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307807ee10071bafbe922eb18d2517d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2023-04-05更新
|
836次组卷
|
6卷引用:广西横州市横州中学2020-2021学年高二下学期期末考试数学试题
名校
解题方法
8 . 如图,在多面体
中,△
是等边三角形,△
是等腰直角三角形,
,平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc775691cd03e1abed66100c942eb3a8.png)
平面
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
平面
,点
为
的中点,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/2564340d-22ea-4b98-9a30-645db6333e8d.png?resizew=180)
(1)求证:
∥平面
;
(2)若
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4955368b48bff112474b81c00c05d047.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc775691cd03e1abed66100c942eb3a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9215d0542ede79ad53c88f1d0da10af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc775691cd03e1abed66100c942eb3a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/2564340d-22ea-4b98-9a30-645db6333e8d.png?resizew=180)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9906ca0da086c36c05fe3e42cf373fe.png)
您最近一年使用:0次
2021-10-11更新
|
358次组卷
|
3卷引用:广西壮族自治区贵港市西江高级中学2024届高三上学期10月月考数学试题
9 . 如图,在四棱锥PABCD中,底面ABCD是菱形,侧面PCD是等边三角形且与底面ABCD垂直,PD=AB=4,E、F分别为AB、PC的点,且PF=
PC,AE=
AB.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/696c5b01-a307-494a-8ec9-4dd5ee4cfa88.png?resizew=202)
(1)证明:直线EF//平面PAD;
(2)若BAD=60,求三棱锥BEFC的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/696c5b01-a307-494a-8ec9-4dd5ee4cfa88.png?resizew=202)
(1)证明:直线EF//平面PAD;
(2)若BAD=60,求三棱锥BEFC的体积.
您最近一年使用:0次
2021-10-04更新
|
400次组卷
|
3卷引用:广西柳州铁一中学“韬智杯”2022 届高三上学期大联考数学(文)试题
解题方法
10 . 如图,四边形ABCD与BDEF均为菱形,FA=FC,且∠DAB=∠DBF=60°.
(2)若菱形BDEF边长为2,求三棱锥E-BCD的体积.
(2)若菱形BDEF边长为2,求三棱锥E-BCD的体积.
您最近一年使用:0次
2021-09-24更新
|
322次组卷
|
4卷引用:广西普通高校2022届高三9月摸底考试数学(文)试题