1 . 如图,在三棱柱
中,侧棱垂直于底面,
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2022/5/25/2987114023641088/2989159311589376/STEM/ff8d3be4-f972-45ca-a291-f064be95015a.png?resizew=209)
(1)求证:平面
平面
.
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16cfb38323095090b0fe5eee70b24210.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://img.xkw.com/dksih/QBM/2022/5/25/2987114023641088/2989159311589376/STEM/ff8d3be4-f972-45ca-a291-f064be95015a.png?resizew=209)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed5f0cfc1049f84a04c81bd213afb8d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f96c673a2381f118ea2d3efc0bca1f3.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51f73a0ca4e6c794242489066fddb6c5.png)
您最近一年使用:0次
名校
解题方法
2 . 如图(1),在正方形ABCD中,M、N、E分别为AB、AD、BC的中点,点P在对角线AC上,且
.将
、
、
分别沿MN、MC、NC折起,使A、B、D三点重合(记为F),得四面体MNCF(如图(2)).
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987717797429248/2988506749992960/STEM/1a319f60-0935-4130-8455-4c89375c6783.png?resizew=272)
(1)若正方形ABCD的边长为12,求图(2)所示四面体MNCF的体积;
(2)在图(2)中,求证:
平面FMN.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3eafec61a1760131006a6e6e3b0b999.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d011d6ad89d0b033f96c2efbb314d78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c029536981907d032c76e69f427f5c0b.png)
![](https://img.xkw.com/dksih/QBM/2022/5/26/2987717797429248/2988506749992960/STEM/1a319f60-0935-4130-8455-4c89375c6783.png?resizew=272)
(1)若正方形ABCD的边长为12,求图(2)所示四面体MNCF的体积;
(2)在图(2)中,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3834a4bb20d2b065695dbf53091b065.png)
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3 . 如图,在边长为4的正三角形ABC中,E,F分别是边AB,AC上的点,
,
,
,
,垂足分别是D,H,G,将△ABC绕AD所在直线旋转180°.
![](https://img.xkw.com/dksih/QBM/2022/5/14/2979371749154816/2980831808503808/STEM/772b804c-d0e5-4fb1-867d-3e3ac3a57ca5.png?resizew=190)
(1)由图中阴影部分旋转形成的几何体的体积记为V,当E,F分别为边AB,AC的中点时,求V;
(2)由内部空白部分旋转形成的几何体侧面积记为S,当E,F分别在什么位置时,S最大?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee73452ee4d5437f1399f1235b95e55f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/179f83b6490ae006ae5a536bd8b63db6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7699dd30e08702bfc6499eb9c89e54a.png)
![](https://img.xkw.com/dksih/QBM/2022/5/14/2979371749154816/2980831808503808/STEM/772b804c-d0e5-4fb1-867d-3e3ac3a57ca5.png?resizew=190)
(1)由图中阴影部分旋转形成的几何体的体积记为V,当E,F分别为边AB,AC的中点时,求V;
(2)由内部空白部分旋转形成的几何体侧面积记为S,当E,F分别在什么位置时,S最大?
您最近一年使用:0次
2022-05-16更新
|
488次组卷
|
3卷引用:陕西省咸阳市礼泉县第二中学2022-2023学年高一下学期期中数学试题
名校
解题方法
4 . 在四棱锥
中,底面
为直角梯形,
,E为
的中点,点P在平面
内的投影F恰好在直线
上.
![](https://img.xkw.com/dksih/QBM/2022/5/8/2975169770020864/2975787149991936/STEM/06e16c95-d363-4dab-9ed9-8a068904d0f2.png?resizew=179)
(1)证明:
.
(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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cefd90d94e2b2c3d8c3fc8b169466a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://img.xkw.com/dksih/QBM/2022/5/8/2975169770020864/2975787149991936/STEM/06e16c95-d363-4dab-9ed9-8a068904d0f2.png?resizew=179)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0910601e7d760188d10beee6a48f2ac.png)
(2)求点B到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
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解题方法
5 . 在如图所示的圆锥中,
、
是该圆锥的两条不同母线,M、N分别它们的中点,圆锥的高为h,底面半径为r,
,且圆锥的体积为
.
![](https://img.xkw.com/dksih/QBM/2022/3/24/2942994372247552/2945981338492928/STEM/faa3f021d2a9487f9b8252c327f59be7.png?resizew=142)
(1)求证:直线
平行于圆锥的底面;
(2)求圆锥的表面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a6909c754c5f8f6ebdf9ad6c284e87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eff47399796b1a7d692c229593228bc.png)
![](https://img.xkw.com/dksih/QBM/2022/3/24/2942994372247552/2945981338492928/STEM/faa3f021d2a9487f9b8252c327f59be7.png?resizew=142)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
(2)求圆锥的表面积.
您最近一年使用:0次
2022-03-28更新
|
507次组卷
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3卷引用:陕西省西安八校2022届高三下学期第二次联考文科数学试题
6 . 已知三棱锥D-ABC,△ABC与△ABD都是等边三角形,AB=2.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/29/436adf57-234a-4e1b-a7ff-b7bb68f5ccb6.png?resizew=145)
(1)若
,求证:平面ABC⊥平面ABD;
(2)若AD⊥BC,求三棱锥D-ABC的体积.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/29/436adf57-234a-4e1b-a7ff-b7bb68f5ccb6.png?resizew=145)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18834f4ba51bf4d490f35ed02379fec7.png)
(2)若AD⊥BC,求三棱锥D-ABC的体积.
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2022-03-11更新
|
1217次组卷
|
6卷引用:陕西省部分学校2024届高三下学期高考仿真模拟(一)文科数学试题(全国卷)
陕西省部分学校2024届高三下学期高考仿真模拟(一)文科数学试题(全国卷)贵州省贵阳市2022届高三适应性监测考试(一)数学(文)试题高考广西桂林、崇左市2022届高三5月联合模拟考试数学(文)试题(已下线)第8.6讲 空间直线、平面的垂直-2021-2022学年高一数学链接教材精准变式练(人教A版2019必修第二册)广东省揭阳市惠来县第一中学2021-2022学年高一下学期第二次阶段考数学试题新疆塔城市第三中学2022-2023学年高二上学期期中数学试题
名校
解题方法
7 . 如图,在正三棱柱(底面是正三角形的直三棱柱)
中,
,D,E分别是
的中点.
![](https://img.xkw.com/dksih/QBM/2022/2/16/2917484579733504/2933026863177728/STEM/1919073f-1ccf-4c21-b585-55d7c4fa9387.png?resizew=138)
(1)求证:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c268ff5785e303b8420de92b2ef680c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13698f6fb90eb5957df14a077c567af.png)
![](https://img.xkw.com/dksih/QBM/2022/2/16/2917484579733504/2933026863177728/STEM/1919073f-1ccf-4c21-b585-55d7c4fa9387.png?resizew=138)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bd87eb91c373da659934ccb01dae2b9.png)
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2022-03-10更新
|
889次组卷
|
4卷引用:陕西省西安市周至县2022届高三下学期一模文科数学试题
陕西省西安市周至县2022届高三下学期一模文科数学试题(已下线)第八章 立体几何初步(章末综合卷)-2021-2022学年高一数学链接教材精准变式练(人教A版2019必修第二册)广西玉林市县级重点高中2021-2022学年高一下学期期中联考数学试题安徽省宣城中学2021-2022学年高一下学期期中数学试题
名校
解题方法
8 . 如图,在三棱柱
中,
平面
,
,
,
,M为棱
的中点.
![](https://img.xkw.com/dksih/QBM/2022/2/13/2915479012761600/2921795496157184/STEM/8d0ecf311d8d4c2c92634a68c1850e49.png?resizew=185)
(1)证明:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.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/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/2022/2/13/2915479012761600/2921795496157184/STEM/8d0ecf311d8d4c2c92634a68c1850e49.png?resizew=185)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/139da6530a5bbc05b36e23fc1c8cac6f.png)
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2022-02-22更新
|
788次组卷
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3卷引用:陕西省咸阳市武功县2022届高三下学期第二次质量检测文科数学试题
陕西省咸阳市武功县2022届高三下学期第二次质量检测文科数学试题(已下线)重难点03 立体几何与空间向量-2022年高考数学【热点·重点·难点】专练(全国通用)四川省宜宾市第四中学校2022-2023学年高三上学期12月月考数学(文科)试题
2010·广东汕头·一模
名校
解题方法
9 . 如图,四棱锥
的底面是边长为1的正方形,侧棱
底面
,且
,E是侧棱
上的动点.
的体积;
(2)如果E是
的中点,求证:
平面
;
(3)是否不论点E在侧棱
的任何位置,都有
?证明你的结论.
![](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/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
(2)如果E是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bb178784aa857d4d4683e650273f054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(3)是否不论点E在侧棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/509d8dd6031dc0ef92075877e53fe201.png)
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2024-01-04更新
|
623次组卷
|
5卷引用:陕西省西安市西安中学2023-2024学年高二学考仿真考试数学试题
陕西省西安市西安中学2023-2024学年高二学考仿真考试数学试题(已下线)汕头市2009-2010学年度第二学期高三级数学综合测练题(理四)2017届北京市海淀区高三3月适应性考试(零模)文科数学试卷广东省2024年1月高中合格性学业水平考试模拟测试数学试题(三)(已下线)第13讲 8.6.2直线与平面垂直的性质定理 (第2课时)-【帮课堂】(人教A版2019必修第二册)
名校
解题方法
10 . 如图,四棱锥
的底面是边长为
的菱形,
,
,且
面
,
、
分别是棱
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/8680d0fd-3f50-4ccb-b4a9-bc6495ad7dea.png?resizew=191)
(1)求证:
平面
;
(2)求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05740f0c6071846227dc0ec177ad15e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491c3a4f72b84ebadd28b90711435adc.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/8680d0fd-3f50-4ccb-b4a9-bc6495ad7dea.png?resizew=191)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
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2022-01-27更新
|
543次组卷
|
3卷引用:陕西省宝鸡市渭滨区2021-2022学年高一上学期期末数学试题
陕西省宝鸡市渭滨区2021-2022学年高一上学期期末数学试题(已下线)第11讲空间直线、平面的垂直(核心考点讲与练)-2021-2022学年高一数学考试满分全攻略(人教A版2019必修第二册)(原卷版)河南省新乡市第一中学2024届高三上学期一轮复习11月考试数学试题