名校
1 . 如图,四棱锥
中,底面
为平行四边形,
底面
,且
,
.
![](https://img.xkw.com/dksih/QBM/2017/11/25/1824658750365696/1825596991848448/STEM/0d911bc44d084732b6847775dc0c987f.png?resizew=175)
(1)求证:平面
平面
;
(2)如果
是棱
上的点,
是棱
上一点,
,且三棱锥
的体积为
,求
的值.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e624e6ee68b796f70f9d35e78a8aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1ac2e11788860424508ea9e80cf89d.png)
![](https://img.xkw.com/dksih/QBM/2017/11/25/1824658750365696/1825596991848448/STEM/0d911bc44d084732b6847775dc0c987f.png?resizew=175)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb4f47cccdb7195f15858fcfdf644214.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2329ab55ae9452449e058c89b3fc394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e6486784415f3537c9a13556c05d893.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced22fbe85d4a749c7b0b6bbae3ea3e7.png)
您最近一年使用:0次
2017-03-09更新
|
1775次组卷
|
3卷引用:2016-2017学年江西省南昌市第二中学高二下学期第一次阶段性考试数学(文)试卷
名校
解题方法
2 . 如图所示,在长方体
中,
分别是
的中点 .
(Ⅰ)求证:
平面
;
(Ⅱ)若
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d6dc34b0b71d46a91eb8dd8db01f5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45dddb86c2cb474b8bbf71e276ee1380.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4cd2b33bd983a9ed6575b9de04a46a.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3b6111b82679d210a7102d866d275a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/262b958cb704607cd5c0a92253de258e.png)
![](https://img.xkw.com/dksih/QBM/2017/2/25/1631786190127104/1633013630066688/STEM/d1e1e94bf5cc46a79a684cd187017ede.png?resizew=173)
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2017-02-27更新
|
1819次组卷
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3卷引用:江西省上高二中2020-2021学年高二下学期第六次月考数学(文)试题
3 . 在棱长为3的正方体
中,
在线段
上,且
,
为线段
上的动点,则三棱锥
的体积为( )
![](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/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6536d52f38da688b6eed5c9211428e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0eaeb29ba5198d1bd74e7458856749a.png)
A.1 | B.![]() | C.![]() | D.与![]() |
您最近一年使用:0次
2016-12-04更新
|
1897次组卷
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7卷引用:2016-2017学年江西赣州寻乌中学高二上月考一理数学试卷
4 . 如图1,在直角梯形
中,AB∥CD,
,且
.现以
为一边向梯形外作正方形
,然后沿边
将正方形
翻折,使平面
与平面
垂直,如图2.
![](https://img.xkw.com/dksih/QBM/2019/1/3/2110811715805184/2111049293520896/STEM/2ea8db955a8d44a491a0bfef2a38dace.png?resizew=234)
![](https://img.xkw.com/dksih/QBM/2019/1/3/2110811715805184/2111049293520896/STEM/5ea8ee190010464ba35f39850ab79ca7.png?resizew=243)
(Ⅰ)求证:BC⊥平面DBE;
(Ⅱ)求点D到平面BEC的距离.
![](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/0046177466c78f08d45449dc5639bf38.png)
![](https://img.xkw.com/dksih/QBM/2019/1/3/2110811715805184/2111049293520896/STEM/61d0137215694d4293f33de295916c0e.png?resizew=28)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2019/1/3/2110811715805184/2111049293520896/STEM/2ea8db955a8d44a491a0bfef2a38dace.png?resizew=234)
![](https://img.xkw.com/dksih/QBM/2019/1/3/2110811715805184/2111049293520896/STEM/5ea8ee190010464ba35f39850ab79ca7.png?resizew=243)
(Ⅰ)求证:BC⊥平面DBE;
(Ⅱ)求点D到平面BEC的距离.
您最近一年使用:0次
2016-12-04更新
|
1034次组卷
|
7卷引用:【校级联考】江西省南康中学、于都中学2018-2019学年高二上学期第三次月考数学(理)试题
5 . 如图,四棱柱
的底面
是菱形,
,
底面
,
.
![](https://img.xkw.com/dksih/QBM/2016/4/6/1572568078196736/1572568084013056/STEM/b11fec0fb8a04f5985123dc2069e72b2.png?resizew=353)
(1)证明:
平面
;
(2)若
,求点
到平面
的距离.
![](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/a23f01af749100e1888bba06268843db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e5981445b6f2a6c58974158d96a4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92105835f8075cb75dff244e908370b5.png)
![](https://img.xkw.com/dksih/QBM/2016/4/6/1572568078196736/1572568084013056/STEM/b11fec0fb8a04f5985123dc2069e72b2.png?resizew=353)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077bd9530ff11b780d01f8c87d6caa54.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6906f59d09ce31956d6f5ea2b23fc77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff7e524de0f5d99fbd82f58d28dd4219.png)
您最近一年使用:0次
2016-12-04更新
|
673次组卷
|
3卷引用:2015-2016学年江西省抚州市南城一中高二3月月考文科数学试卷
名校
解题方法
6 . 已知三棱锥
的底面是以
为斜边的等腰直角三角形,
则三棱锥的外接球的球心到平面
的距离是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7924f2fd1bcff9dd885b250c1c904425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56a65803ccd2a13af87bf3a81482a034.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
A.![]() | B.1 | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-03更新
|
917次组卷
|
10卷引用:2014-2015学年江西南昌二中高二下期第二次月考理数学卷
2014-2015学年江西南昌二中高二下期第二次月考理数学卷安徽省合肥市第八中学2020-2021学年高二上学期第一次段考理科数学试题2016届广西武鸣县高中高三8月月考文科数学试卷2017届广东省惠州市高三第一次调研理科数学试卷2017届广东省惠州市高三第一次调研文科数学试卷新疆博尔塔拉蒙古自治州第五师高级中学2019-2020学年高三上学期第二次月考数学(文)试题(已下线)2018年高考二轮复习测试专项【新课标理科】热点七 几何体与球切、接的问题(已下线)2018年高考二轮复习测试专项【新课标文科】热点七 几何体与球切、接的问题(已下线)考点24 空间直线、平面的平行、垂直问题-2021年新高考数学一轮复习考点扫描陕西省汉中市2022届高三下学期教学质量第二次检测考试文科数学试题
7 . 如图,在四棱锥
中,
为
上一点,面
面
,四边形
为矩形
,
,
.
(1)已知
,且
∥面
,求
的值;
(2)求证:
面
,并求点
到面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](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/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41130cc7adda7256e37caf3da3229109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b58bbc02479917ad761a24eaae0dbfd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac5a0f84f14c15a0d4c2c912dcd01302.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a12b081bc43f5bcc4f23a1d649fde7f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a0787d2cb66d00c49d3348b52acd407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4739ad948445af72d585fe29c745929b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://img.xkw.com/dksih/QBM/2014/6/4/1571755094605824/1571755100422144/STEM/d2c09a484c154275bdfe253da9a57fc4.png?resizew=240)
您最近一年使用:0次
2016-12-03更新
|
2838次组卷
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3卷引用:江西省信丰中学2018-2019学年高二上学期第二次月考数学(理A+、A)试题
江西省信丰中学2018-2019学年高二上学期第二次月考数学(理A+、A)试题(已下线)2014届江西省重点中学盟校高三第二次联考文科数学试卷【全国百强校】河南省南阳市第一中学2019届高三第十四次考试数学(文)试题