解题方法
1 . 如图,在四棱锥
中,
平面
,
,
,且
,
.
![](https://img.xkw.com/dksih/QBM/2020/8/13/2526810044841984/2527025946664960/STEM/942a699a75824d0cae0c2dd53a0c7ed3.png?resizew=199)
(1)证明:
.
(2)若
,且四棱锥
的的体积为
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c42ed2e5bd5a0f033e24008697bf4963.png)
![](https://img.xkw.com/dksih/QBM/2020/8/13/2526810044841984/2527025946664960/STEM/942a699a75824d0cae0c2dd53a0c7ed3.png?resizew=199)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbd7c2767c106faf27d6a97ebc8e739.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8987ae19d2d5c1955c53f18644556acc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
您最近一年使用:0次
2020-08-13更新
|
222次组卷
|
2卷引用:广西玉林市、百色市2020届高三(5月份)高考数学(文科)质检试题(一模)
名校
解题方法
2 . 底面
为菱形且侧棱
底面
的四棱柱被一平面截取后得到如图所示的几何体.若
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/e4e8e323-af27-41eb-8df5-b76548cace5c.png?resizew=152)
(1)求证:
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19120a405391fcc6122531523a7424e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ed834662394863388c3f993088fb55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/e4e8e323-af27-41eb-8df5-b76548cace5c.png?resizew=152)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6564dde523adfdbdf7860c1bbdc4db8f.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0fb98facc6b8400726136deadd3f1e7.png)
您最近一年使用:0次
2020-04-15更新
|
368次组卷
|
5卷引用:2020届广西桂林、崇左、贺州高三下学期二模数学(文)试题
解题方法
3 . 如图,菱形
的边长为4,
,
为
中点,将
沿
折起使得平面
平面
,
与
相交于点
,
是棱
上的一点且满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/5747de02-217e-4d6b-99b7-70ea87cb48e8.png?resizew=409)
(1)求证:
∥平面
;
(2)求四面体
的体积.
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.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/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8210bde150614e503abe6cf5945d2e34.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/5747de02-217e-4d6b-99b7-70ea87cb48e8.png?resizew=409)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4cd68cc82e90a5e2049a7ea3171b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)求四面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5048f9f58dc85ecf61756611c7cd2923.png)
您最近一年使用:0次
2020-05-13更新
|
625次组卷
|
2卷引用:2020届广西柳州市高三毕业班4月模拟(三模)文科数学试题
名校
解题方法
4 . 四棱锥P﹣ABCD中,AB∥CD,AB⊥BC,AB=BC=1,PA=CD=2,PA⊥底面ABCD,E在PB上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/bb11194a-b5b7-4aa7-8127-ee8c98a76eeb.png?resizew=167)
(1)证明:AC⊥PD;
(2)若PE=2BE,求三棱锥P﹣ACE的体积.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/bb11194a-b5b7-4aa7-8127-ee8c98a76eeb.png?resizew=167)
(1)证明:AC⊥PD;
(2)若PE=2BE,求三棱锥P﹣ACE的体积.
您最近一年使用:0次
2020-05-30更新
|
1977次组卷
|
6卷引用:广西桂林十八中2020届高三(7月份)高考数学(文科)第十次适应性试题
名校
解题方法
5 . 如图,在四棱锥
中,
平面
,
,
,且
,
.
![](https://img.xkw.com/dksih/QBM/2020/8/13/2527164359933952/2530081765457920/STEM/d3709ca37b954a1d97f5a6f0046b6279.png?resizew=244)
(1)证明:
;
(2)若
,且四棱锥
的体积为
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd95dc30c0344788b94289c464a3158e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1602c3d3e9628cd503a443024410e87a.png)
![](https://img.xkw.com/dksih/QBM/2020/8/13/2527164359933952/2530081765457920/STEM/d3709ca37b954a1d97f5a6f0046b6279.png?resizew=244)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbd7c2767c106faf27d6a97ebc8e739.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d64315949d64f0c37115584e8396c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
您最近一年使用:0次
2020-08-18更新
|
129次组卷
|
3卷引用:广西钦州市2019-2020学年高三5月质量检测数学(文)试题
广西钦州市2019-2020学年高三5月质量检测数学(文)试题(已下线)专题19 立体几何综合-2020年高考数学(文)母题题源解密(全国Ⅲ专版)新疆生产建设兵团第四师第一中学2019-2020学年高一下学期期末考试数学试题
6 . 如图,在三棱柱
中,已知
侧面
,
,
,
,点
在棱
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/283da42c-6155-42d1-9e31-92be4609c11c.png?resizew=213)
(1)求证:
平面
;
(2)试确定点
的位置,使三棱锥
的体积为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f144992e1cbee34868abce1e5ad38c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4639a9dc0bc99101cbde59fef04b4a2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d12627f0d12f866bc6c05de028c4b58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/283da42c-6155-42d1-9e31-92be4609c11c.png?resizew=213)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06ad7c180d6d084ecb25f23cb6fe9b10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)试确定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82be3b8b10e8b529be0f66f1bb5ba6fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
您最近一年使用:0次
7 . 如图,在四棱锥
中,底面
是梯形,
,
,
,
,侧面
底面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/fcd3fbfe-e9e3-460c-bc33-6b979db5db1e.png?resizew=162)
(1)求证:平面
平面
;
(2)若
,且三棱锥
的体积为
,求侧面
的面积.
![](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/68d31600cba2d5256c7e78b6122d6755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e270a358087318deb85f1e955f14375.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a171e9db435951d4109d1be2510a4c60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/877582b5387278008d14fe5932622fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/fcd3fbfe-e9e3-460c-bc33-6b979db5db1e.png?resizew=162)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dd470cd9dfcde7f7e1762af28bc649c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d923a338dd2d2e29336b42574d38448.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cc83032604623907a7a73b2b3c442f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69dd9f16a5c7a66e62e52fd66f4449ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8b1ebfb8826a78c8c29685337a07092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25df618ec33cee978f79d2eae62024f2.png)
您最近一年使用:0次
2019-12-07更新
|
358次组卷
|
8卷引用:2019年11月广西壮族自治区柳州市一模数学(文)试题
2019年11月广西壮族自治区柳州市一模数学(文)试题2020届广西柳州市高三第一次模拟考试数学(文)试题四川省泸州市2018届高三第一次诊断性考试数学(文)试题(已下线)黄金30题系列 高三年级数学(文) 大题好拿分【提升版】(已下线)专题8.5 直线、平面垂直的判定及其性质(讲)【理】-《2020年高考一轮复习讲练测》(已下线)第25节 直线、平面垂直的判定与性质-备战2023年高考数学一轮复习考点帮(全国通用)(已下线)专题8.5 直线、平面垂直的判定及其性质(练)【理】-《2020年高考一轮复习讲练测》(已下线)第02讲 基本图形的位置关系(2)
解题方法
8 . 如图,三棱柱
中,侧面
是菱形,其对角线的交点为O,且
,
C.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/07191ad7-5b00-4fbb-984f-10dd2a028643.png?resizew=222)
求证:
平面
;
设
,若直线AB与平面
所成的角为
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92eebc380b5689d2dd2bc4a55d4aea3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18520f1b366c4fa6e8b137fc5019756c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/07191ad7-5b00-4fbb-984f-10dd2a028643.png?resizew=222)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce03b310edce42191f9fa75a1c909ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb5a97c6b563f00d0a71aef901eb7277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c8896fdc11b62ba3966acbf4f06375.png)
您最近一年使用:0次
2020-03-18更新
|
355次组卷
|
2卷引用:2019届广西梧州市高考一模试卷(文科)数学试题
名校
解题方法
9 . 如图,在棱长为
的正方体
中,
,
,
分别为棱
,
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/7d156a01-b32c-438d-ab0b-c18935e772a4.png?resizew=155)
(1)求证:
;
(2)求四面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/7d156a01-b32c-438d-ab0b-c18935e772a4.png?resizew=155)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf66593365cd8f1f7dad5471048471a4.png)
(2)求四面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/496cbc4ce4e8914e25613c1e680a0455.png)
您最近一年使用:0次
2020-04-08更新
|
366次组卷
|
5卷引用:广西柳州高级中学2019-2020学年高三3月线上月考数学(文)试题
广西柳州高级中学2019-2020学年高三3月线上月考数学(文)试题2020届湖北省武汉市高三下学期3月质量检测数学(文)试题(已下线)专题04 立体几何-2020年高三数学(文)3-4月模拟试题汇编(已下线)文科数学-6月大数据精选模拟卷03(新课标Ⅲ卷)(满分冲刺篇)江西省安福中学2023届高三第一次质量检测数学(理)试题