名校
解题方法
1 . 在四棱锥
中,
底面
,底面
是直角梯形,
,
,
,
.
(1)求证:
平面
;
(2)求证:
平面
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d262480ffb55b7617f44b63f130c154a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307807ee10071bafbe922eb18d2517d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/5/8cc788c8-95e2-4f3a-b9d9-b27dcda8c0b8.png?resizew=280)
您最近一年使用:0次
2 . 如图,四棱锥
中,底面四边形
是直角梯形,
,
是边长为2的等边三角形,
是
的中点,
是棱
的中点,
.
(1)求证:平面
平面
;
(2)求三棱锥
的体积.
![](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/90ff6d7dd48b57f03d82d2c522ee9b94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3da7bcea5a45eeae211f5851f12a7517.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb8606c71f6326ecba10b96a347b3e4.png)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec88d7f3f4c5f0cd911afce38eaa046c.png)
![](https://img.xkw.com/dksih/QBM/2017/10/17/1797157902688256/1797168589463552/STEM/9340b3c64a42466c9b82ef3307f8695c.png?resizew=227)
您最近一年使用:0次
2017-10-17更新
|
1095次组卷
|
2卷引用:内蒙古赤峰市第二中学2018届高三上学期第三次月考数学(文)试题
名校
解题方法
3 . 如图,四面体
中,
分别是
的中点,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/21515786-3e80-4894-a995-85082239aecc.png?resizew=170)
(1)求证:
平面
;
(2)求几何体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfac974ca3d2a8a707bb0c22cf584502.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd04514f4f3bfbfb194b640f80fa2d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6559aabe16c2318687089e7cc498b98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65d5853c26657db448af610ac72cca4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/21515786-3e80-4894-a995-85082239aecc.png?resizew=170)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce03b310edce42191f9fa75a1c909ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)求几何体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af8ed3523e5a54fc8d5a61180465380f.png)
您最近一年使用:0次
解题方法
4 . 如图,三棱柱
中,侧面
为菱形,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/7/01b43386-869d-4d4c-bfdc-ef0185719206.png?resizew=147)
(1)证明:
;
(2)若
,
,
,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/00ee347187fbbfe9e8a6faf286795d79.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/7/01b43386-869d-4d4c-bfdc-ef0185719206.png?resizew=147)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7870cee007535b979d35bc7feab75616.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96dcc9419f5a85ebd21211e8eef03fc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f2e238b2757353026133bbe495645e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75e2c8d340cab4a2f7a509eea717dfd5.png)
您最近一年使用:0次
2017-03-22更新
|
558次组卷
|
2卷引用:2017届内蒙古包头市高三下学期第一次模拟考试数学(理)试卷
名校
5 . 如图所示,在三棱柱
中,侧面
与侧面
都是菱形,
,
.
(Ⅰ)求证:
;
(Ⅱ)若
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede6a60cad0e0b58e1549fda6e085719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce731cd45eb83b75e47e20551a97cd45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d8c5b66af3944a4b655055967f958c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb3d814a5e87bf9969c779c306a27a81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a3ced5c98bec7ba2cb7ea0c9bf7389e.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af58726507c48cbb7cfad266680e4d17.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7909074a79d1834f4993489578574112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b13e8f385766fb73e9db98b65a8f732.png)
您最近一年使用:0次
2016-12-03更新
|
1588次组卷
|
8卷引用:2017-2018学年内蒙古集宁第一中学高三上学期第二次月考数学(文)
名校
6 . 在四棱锥P-ABCD中,PA
平面ABCD,PA=2AB=2,
,
,E为PD的中点,在平面PCD内作EF
PC于点F.
![](https://img.xkw.com/dksih/QBM/2017/12/10/1835319528325120/1857319024123904/STEM/b1a3f7e3f60349cca96e598183142f00.png?resizew=199)
(1)求证:F是PC的中点.
(2)求点F到平面ACE的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afc729c99c65cba7e67b86cec33e52fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66217a4757d1640077a0e70a943bfc08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://img.xkw.com/dksih/QBM/2017/12/10/1835319528325120/1857319024123904/STEM/b1a3f7e3f60349cca96e598183142f00.png?resizew=199)
(1)求证:F是PC的中点.
(2)求点F到平面ACE的距离.
您最近一年使用:0次
7 . 在下图所示的几何体中,底面
为正方形,
平面
,
,且
,
为线段
的中点.
![](https://img.xkw.com/dksih/QBM/2017/3/26/1652282515644416/1652839449092096/STEM/0ec5ed3f79ed4c9ead4543a3f4f4dad0.png?resizew=134)
(1)证明:
平面
;
(2)求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc6b593f5b249e1a4aa013d493670bdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a6e07a3ef8f3969afb82f91e6ae4ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/2017/3/26/1652282515644416/1652839449092096/STEM/0ec5ed3f79ed4c9ead4543a3f4f4dad0.png?resizew=134)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c7f7ffbb802aef097bbe1a9321691f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a890337b5f6e70dec67f40a0321e3d31.png)
您最近一年使用:0次
8 . 某设计部门承接一产品包装盒的设计(如图所示),客户除了要求
、
边的长分别为
和
外,还特别要求包装盒必需满足:①平面
平面
;②平面
与平面
所成的二面角不小于
;③包装盒的体积尽可能大.
若设计部门设计出的样品满足:
与
均为直角且
长
,矩形
的一边长为
,请你判断该包装盒的设计是否能符合客户的要求?说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0731be9fc9a06a97db4857ccd2240772.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe872314b0398e8bbc7949f8288271a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d78fc7fcb2762de28dcef8aa3aa0e49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
若设计部门设计出的样品满足:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0731be9fc9a06a97db4857ccd2240772.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec346cba41b378fcd97f1607835e259a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fe872314b0398e8bbc7949f8288271a.png)
![](https://img.xkw.com/dksih/QBM/2011/6/2/1570230713344000/1570230718922752/STEM/b0fb76493f3e44b0b55b79aae71af8ac.png?resizew=156)
您最近一年使用:0次
2016-11-30更新
|
1265次组卷
|
4卷引用:内蒙古北方重工业集团有限公司第三中学2017-2018学年高二上学期期中数学(理科)试题
9 . 在平行四边形
中,
,四边形
为正方形,平面
平面
.记
表示四棱锥
的体积.
![](https://img.xkw.com/dksih/QBM/2017/12/10/1835393293844480/1856014103396352/STEM/3b66f933f0b74773a9cb38b96444dd81.png?resizew=194)
(1)求
的表达式;
(2)求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e920f96d1c461cd886187572ef4d1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5b78d48bd70b977715edc09b1ca98a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/317057535c509a64d7b05d6c90e09ef0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/449952ed30d99baac6d0def4917af584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/485324db59d18aa6363a3c81f0f7d0ac.png)
![](https://img.xkw.com/dksih/QBM/2017/12/10/1835393293844480/1856014103396352/STEM/3b66f933f0b74773a9cb38b96444dd81.png?resizew=194)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa5b44101d1785d7e620d87dc0c0da7.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa5b44101d1785d7e620d87dc0c0da7.png)
您最近一年使用:0次