解题方法
1 . 如图
为矩形,
为梯形,
平面
为
的中点,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed6034301fc4110da89bdb0f46ad82ab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/9/ab9ed002-56ad-43fa-b97d-b76bc08c62c8.png?resizew=153)
(1)求证:
平面
;
(2)若
为正方形,求证:平面
平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2f3df5713a423887c16e6355236372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b190c8d3d7d7d0e6e959e8a52eae90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbd6f10ececa5670a3cf2f6b3348d82a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed6034301fc4110da89bdb0f46ad82ab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/9/ab9ed002-56ad-43fa-b97d-b76bc08c62c8.png?resizew=153)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af142a6050b54e8b5777a085d4597481.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fa3254460ecbacecb3e57c5dce227f4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dc6db50a9709c3f4d84eee7bdf1250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12db0197e46be1223d5ea6e08a57a780.png)
您最近一年使用:0次
2017-04-08更新
|
579次组卷
|
2卷引用:2016-2017学年河南省八市高一下学期第一次联考理科数学试卷
解题方法
2 . 如图,在直四棱柱
中,底面四边形
是直角梯形,其中
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/10/20036beb-06de-45f2-a6df-42441a4d94c5.png?resizew=229)
(1)求证:直线
平面
;
(2)试求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8bbc9f369f0eb01aa216d8e728d985b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/10/20036beb-06de-45f2-a6df-42441a4d94c5.png?resizew=229)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/762b8cac66d86a013ba839266b023e54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7977ab975efa6411cc17de39be70d9.png)
(2)试求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/658c43c2ff8aa0beb27938926a386695.png)
您最近一年使用:0次
2017-04-01更新
|
833次组卷
|
2卷引用:河南省息县第一高级中学2017届高三下学期第一次适应性测试数学(文)试题
3 . 如图,三棱柱
中,各棱长均相等,
,
,
分别为棱
,
,
的中点.
![](https://img.xkw.com/dksih/QBM/2017/3/30/1654848568573952/1655778777300992/STEM/4a5c5209c63e47cdbbc173754e84f6e7.png?resizew=226)
(Ⅰ)证明:
平面
;
(Ⅱ)若三棱柱
为直棱柱,求直线
与平面
所成角的正弦值.
![](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/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/0f1f229274a6e17977cc047814212589.png)
![](https://img.xkw.com/dksih/QBM/2017/3/30/1654848568573952/1655778777300992/STEM/4a5c5209c63e47cdbbc173754e84f6e7.png?resizew=226)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bca84ad86c648d3bb20c8909c8da3f.png)
(Ⅱ)若三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bca84ad86c648d3bb20c8909c8da3f.png)
您最近一年使用:0次
2017-03-31更新
|
622次组卷
|
2卷引用:2017届河南省郑州、平顶山、濮阳市高三第二次质量预测(二模)数学(理)试卷
解题方法
4 . 如图,高为1的等腰梯形
,
,
为
的三等分点.现将
沿
折起,使平面
平面
,连接
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/9/b9ff733e-8a03-4e67-b54d-65c1ba0c126b.png?resizew=354)
(1)在
边上是否存在点
,使
平面
?
(2)当点
为
边中点时,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e4efcf9d55db00bcda50ad66908ae2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/101da161ae17652ccbe7d3f888762c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb23a04ac9df27fb987126e7ba0f6c6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b704ddc39c50386673eaf3ed504d03c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/9/b9ff733e-8a03-4e67-b54d-65c1ba0c126b.png?resizew=354)
(1)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5edfe97aeab0cf16b40fa9d2e15f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fcce61c3d158b5331d6de10db3fb55d.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fcce61c3d158b5331d6de10db3fb55d.png)
您最近一年使用:0次
2017-03-31更新
|
670次组卷
|
2卷引用:2017届河南省郑州、平顶山、濮阳市高三第二次质量预测(二模)数学(文)试卷
5 . 如图,正方形ABCD和四边形ACEF所在的平面互相垂直.EF//AC,AB=
,CE=EF=1
![](https://img.xkw.com/dksih/QBM/2010/6/9/1569759632564224/1569759637405696/STEM/4140bb7a190945408038b2f925094cda.png?resizew=193)
(Ⅰ)求证:AF//平面BDE;
(Ⅱ)求证:CF⊥平面BDE;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/2010/6/9/1569759632564224/1569759637405696/STEM/4140bb7a190945408038b2f925094cda.png?resizew=193)
(Ⅰ)求证:AF//平面BDE;
(Ⅱ)求证:CF⊥平面BDE;
您最近一年使用:0次
2019-01-30更新
|
2729次组卷
|
20卷引用:2015-2016学年河南省北大附中分校高二普通班上学期期末理科数学卷
2015-2016学年河南省北大附中分校高二普通班上学期期末理科数学卷2010年普通高等学校招生全国统一考试数学(文)(北京卷)2010年高考试题北京(理科)卷数学试题(已下线)2010年高考试题分项版理科数学之专题九 立体几何(已下线)2011届广东省深圳高级中学高三高考最后模拟考试文数(已下线)2011-2012学年安徽省太湖中学高一第二学期期中考试数学试卷(已下线)2011-2012学年山东省汶上一中高一下学期期中考试数学试卷(已下线)2014届人教版高考数学文科二轮专题复习提分训练26练习卷2015-2016学年河北省冀州市中学高一下开学考试数学试卷北京市西城区41中2016-2017学年高二上学期期中考试数学试题【校级联考】山东省淄博市普通高中2017-2018学年高二下学期期末联考数学(理)试卷(已下线)第02章 章末检测(B)-2018-2019版数学创新设计课堂讲义同步系列(人教A版必修2)【全国百强校】陕西省西安中学2018-2019学年高一上学期期末考试数学试题人教A版(2019) 必修第二册 突围者 第八章 综合拓展提升安徽省合肥市第六中学2019-2020学年高二上学期期中数学(文)试题(已下线)专题14 立体几何初步复习与检测(知识精讲)-【新教材精创】2019-2020高一数学新教材知识讲学(人教A版必修第二册)-《高中新教材知识讲学》西藏拉萨中学2020届高三(下)第七次月考数学(文科)试题陕西省安康中学2021-2022学年高二上学期第一次月考数学试题北京市北京理工大学附属中学2021-2022学年高二10月数学月考试题宁夏银川市第六中学2021-2022学年高二上学期第一次8月考试数学( 理 )试题
6 . 如图,在多面体ABCDEF中,四边形ABCD是正方形,AB=2EF=2,EF∥AB,EF⊥FB,∠BFC=90°,BF=FC,H为BC的中点,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/d12b5209-9eba-443c-86f8-9f633a9453d2.png?resizew=285)
(Ⅰ)求证:FH∥平面EDB;
(Ⅱ)求证:AC⊥平面EDB;
(Ⅲ)求四面体B—DEF的体积;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/d12b5209-9eba-443c-86f8-9f633a9453d2.png?resizew=285)
(Ⅰ)求证:FH∥平面EDB;
(Ⅱ)求证:AC⊥平面EDB;
(Ⅲ)求四面体B—DEF的体积;
您最近一年使用:0次
2019-01-30更新
|
1567次组卷
|
7卷引用:2015-2016学年河南省鹤壁市淇一中高一下学期分班考试数学试卷
2015-2016学年河南省鹤壁市淇一中高一下学期分班考试数学试卷2010年普通高等学校招生全国统一考试(安徽卷)文科数学(已下线)2010年南安一中高二下学期期末考试(文科)数学卷(已下线)2011届辽宁省东北育才中学高三第六次模拟考试数学文卷2015-2016学年山西怀仁一中高二下第一次月考文科数学卷上海市第十中学2022-2023学年高二上学期期末数学试题(已下线)期末真题必刷常考60题(32个考点专练)-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(沪教版2020必修第三册)
7 . 如图,在四棱锥
中,
平面
,
,
,
,
为
上一点,
平面
.
![](https://img.xkw.com/dksih/QBM/2017/3/13/1643140271390720/1645694313873408/STEM/b7aeaef3e126421f80159b580008e92d.png?resizew=197)
(Ⅰ)证明:
平面
;
(Ⅱ)若
,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5950b2be8b3a4cef62580f73f7e2f778.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28fa14d4841ca3f2fe226688c25c8160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966a75dc7757a928a89dab537a451cc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41bd53d591b76374aec24d7576647b64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed5034a973110e2a6eb2e7d5699c24f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d672e6f77bfb06cc9bc1759bf89af9fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae4b97dd6e72a5ec06f44164a91b429f.png)
![](https://img.xkw.com/dksih/QBM/2017/3/13/1643140271390720/1645694313873408/STEM/b7aeaef3e126421f80159b580008e92d.png?resizew=197)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ad310b026623c7c980c142310854349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ad17b21f4bd28790218601b430b7c27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5950b2be8b3a4cef62580f73f7e2f778.png)
您最近一年使用:0次
名校
解题方法
8 . 如图,在四棱锥
中,已知
,
,
底面
,且
,
,
为
的中点,
在
上,且
.
![](https://img.xkw.com/dksih/QBM/2017/3/7/1638703029534720/1640719368970240/STEM/73f8d69c-0d4a-4428-862c-d8d4f37ceb49.png?resizew=202)
(1)求证:平面
平面
;
(2)求证:
平面
;
(3)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02bd5cfe804460846423e77f72db10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c8da8430ae9b811b82527eb944cea18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c90a2e13488a5f4a2408718837fdabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb4564baf209de77802d46cda82995c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e7fa3aea72ccc36948a4a90f7368f71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dab8aacb7ddd4c8fac790d19a92689a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d260c4df7b0dc180af6980d21f3371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cba5a44b94b99ed168bf7eef0a70c443.png)
![](https://img.xkw.com/dksih/QBM/2017/3/7/1638703029534720/1640719368970240/STEM/73f8d69c-0d4a-4428-862c-d8d4f37ceb49.png?resizew=202)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebbb79892c8cb8871a08437acc09bc80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dda09fb28b8f1e165715cca61d64f9c1.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd19c4db61254be8512edf741bf9f978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3520ee9cc97a075e889e1625dba1157c.png)
(3)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07652a9239c614f55564c2a29a46dd69.png)
您最近一年使用:0次
2017-03-10更新
|
1628次组卷
|
5卷引用:河南省鹤壁市2018-2019学年高一上学期期末数学试题
9 . 如图,在直三棱柱
中,
,
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/85b882eb-3664-4885-90df-a442972a079e.png?resizew=174)
(1)证明:
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/295640e886a3a29c5159a93fa287ee68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb01d2b57580731c8b807ac8cffc8ba.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/editorImg/2022/12/5/85b882eb-3664-4885-90df-a442972a079e.png?resizew=174)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca714e3eade6d63792b729f4ff9f8316.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62fd0b510920be6bc60d170c3ff3da3.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2eb89294b31ffdd2680b4361e8994d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62fd0b510920be6bc60d170c3ff3da3.png)
您最近一年使用:0次
2019-01-14更新
|
669次组卷
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4卷引用:河南省部分省示范性高中2018-2019学年高三数学试卷(理科)1月份联考试题
河南省部分省示范性高中2018-2019学年高三数学试卷(理科)1月份联考试题(已下线)重庆市杨家坪中学09-10高二下学期质量检测数学试题【省级联考】吉林省高中2019届高三上学期期末考试数学(理)试题黑龙江省哈尔滨市第九中学2019-2020学年高二上学期期末数学试题
10 . 在如图所示的几何体中,四边形
是正方形,
平面
,
分别为
的中点,且
.
![](https://img.xkw.com/dksih/QBM/2017/3/3/1635734485401600/1635910460702720/STEM/68bc0ad244c64227b335d6a4297567d1.png?resizew=196)
(1)求证:平面
平面
;
(2)求证:平面
平面
;
(3)求三棱锥
与四棱锥
的体积之比.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/821f8dbb1df39a1aa3070af00c8fb044.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/308f5a2ad097843999e6d9e68d6cf022.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52ae89f94a73f32a4ed3b138bea550ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e096b55732175ddd58f851903b87dc65.png)
![](https://img.xkw.com/dksih/QBM/2017/3/3/1635734485401600/1635910460702720/STEM/68bc0ad244c64227b335d6a4297567d1.png?resizew=196)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827af56c71c49a224f75f59e4ffbf71a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea538365f9a15deeea31f87a5d745b4e.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c82799f3333a3a8c9659935fb9902726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dda09fb28b8f1e165715cca61d64f9c1.png)
(3)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff73b7f5d154b2f7a1962c26841624fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02bd5cfe804460846423e77f72db10f.png)
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2017-03-03更新
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2卷引用:河南省信阳高级中学2017-2018学年高一下学期开学考试数学试题