1 . 如图,
为圆
的直径,
垂直圆
所在的平面,点
为圆
上的一点.
![](https://img.xkw.com/dksih/QBM/2016/10/14/1573069407420416/1573069413687296/STEM/13f8ebe5306c4de3a2c63d1371fe910e.png)
(Ⅰ)求证:
平面
;
(Ⅱ)若
,点
为
的中点,求三棱锥
的体积.
![](https://img.xkw.com/dksih/QBM/2016/10/14/1573069407420416/1573069413687296/STEM/1cbda0faab3d4e06a4ef6dec3b7c70ee.png)
![](https://img.xkw.com/dksih/QBM/2016/10/14/1573069407420416/1573069413687296/STEM/63799372a0584d1abfa72e97af1c3348.png)
![](https://img.xkw.com/dksih/QBM/2016/10/14/1573069407420416/1573069413687296/STEM/e25de667003048ae81bd37fb20ffadd9.png)
![](https://img.xkw.com/dksih/QBM/2016/10/14/1573069407420416/1573069413687296/STEM/63799372a0584d1abfa72e97af1c3348.png)
![](https://img.xkw.com/dksih/QBM/2016/10/14/1573069407420416/1573069413687296/STEM/39122c8f7a244bd785dea4c87f222cd7.png)
![](https://img.xkw.com/dksih/QBM/2016/10/14/1573069407420416/1573069413687296/STEM/63799372a0584d1abfa72e97af1c3348.png)
![](https://img.xkw.com/dksih/QBM/2016/10/14/1573069407420416/1573069413687296/STEM/13f8ebe5306c4de3a2c63d1371fe910e.png)
(Ⅰ)求证:
![](https://img.xkw.com/dksih/QBM/2016/10/14/1573069407420416/1573069413687296/STEM/23ab43d7b5bf402db2e9c936aec0f6ce.png)
![](https://img.xkw.com/dksih/QBM/2016/10/14/1573069407420416/1573069413687296/STEM/9452d276bb9c4291b178492746277569.png)
(Ⅱ)若
![](https://img.xkw.com/dksih/QBM/2016/10/14/1573069407420416/1573069413687296/STEM/5909558773d94752a6c8bfb1ebf7861f.png)
![](https://img.xkw.com/dksih/QBM/2016/10/14/1573069407420416/1573069413687296/STEM/cdf2e8be2f044c2cb9f9cb2727a594bf.png)
![](https://img.xkw.com/dksih/QBM/2016/10/14/1573069407420416/1573069413687296/STEM/8b031ea0bcfe48b98673cbbcf735f959.png)
![](https://img.xkw.com/dksih/QBM/2016/10/14/1573069407420416/1573069413687296/STEM/09a47c181f0948349870ce6f0aa2295d.png)
您最近一年使用:0次
2016-12-04更新
|
777次组卷
|
2卷引用:2016届山西省高考考前质量检测三理科数学试卷
解题方法
2 . 某三棱住被一个平面截去一部分后所得的几何的三视图如图所示, 其中俯视图是边长为
的正三角形, 则截去部分与剩余部分的体积之比为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/14/a94aad12-181a-4d1b-9128-49f032426958.png?resizew=240)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/14/a94aad12-181a-4d1b-9128-49f032426958.png?resizew=240)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
3 . 如图,在三棱柱
中,侧棱垂直于底面,
,
,
,
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/2016/1/13/1572433366376448/1572433372291072/STEM/6db44748b8914ed39a2a5b47c3d64bc7.png)
(1)求证:平面
平面
;
(2)求证:
平面
;
(3)求三棱锥
的体积.
![](https://img.xkw.com/dksih/QBM/2016/1/13/1572433366376448/1572433372291072/STEM/7fe1c5662523414fa4775b02ad965d03.png)
![](https://img.xkw.com/dksih/QBM/2016/1/13/1572433366376448/1572433372291072/STEM/cb69261f4b334fea9baea7eb3f61d3c5.png)
![](https://img.xkw.com/dksih/QBM/2016/1/13/1572433366376448/1572433372291072/STEM/4b4badfd9fe5465bbfc33c288d60c2b5.png)
![](https://img.xkw.com/dksih/QBM/2016/1/13/1572433366376448/1572433372291072/STEM/a9b692765b984177b39af71d324b279e.png)
![](https://img.xkw.com/dksih/QBM/2016/1/13/1572433366376448/1572433372291072/STEM/225559ff3f734c129ec72ae4cad783f4.png)
![](https://img.xkw.com/dksih/QBM/2016/1/13/1572433366376448/1572433372291072/STEM/2ba34d4623404475a809628aa144a5df.png)
![](https://img.xkw.com/dksih/QBM/2016/1/13/1572433366376448/1572433372291072/STEM/c758a0f34d954ab7bece4281ed330d8d.png)
![](https://img.xkw.com/dksih/QBM/2016/1/13/1572433366376448/1572433372291072/STEM/7d1b4d8761c04efab2ca0c006ec41ee4.png)
![](https://img.xkw.com/dksih/QBM/2016/1/13/1572433366376448/1572433372291072/STEM/6db44748b8914ed39a2a5b47c3d64bc7.png)
(1)求证:平面
![](https://img.xkw.com/dksih/QBM/2016/1/13/1572433366376448/1572433372291072/STEM/0959666ae3254b11ae29fe29897e39ec.png)
![](https://img.xkw.com/dksih/QBM/2016/1/13/1572433366376448/1572433372291072/STEM/3484ede636064757917677aa397ffb72.png)
(2)求证:
![](https://img.xkw.com/dksih/QBM/2016/1/13/1572433366376448/1572433372291072/STEM/760d01bcbdfd4192861c7fddb8915f80.png)
![](https://img.xkw.com/dksih/QBM/2016/1/13/1572433366376448/1572433372291072/STEM/9a4f8e126fdf46478d3296768ae24ccd.png)
(3)求三棱锥
![](https://img.xkw.com/dksih/QBM/2016/1/13/1572433366376448/1572433372291072/STEM/e89b680f126d43578ed091d462f18801.png)
您最近一年使用:0次
4 . 在三棱柱ABC-A1B1C1中,底面三角形ABC是等边三角形,侧棱
底面
,D为棱AB的中点.
![](https://img.xkw.com/dksih/QBM/2016/3/2/1572513484677120/1572513490944000/STEM/31009b9b-0f9d-448e-8456-482b60d5805f.png)
(1)求证:![](https://img.xkw.com/dksih/QBM/2016/3/2/1572513484677120/1572513490944000/STEM/1d286809ecd4419a9c2a2ce0871a1e3b.png)
;
(2)求证:BC1∥平面A1CD;
(3)若AB=1,AA1=
,求三棱锥D-A1B1C的体积.
![](https://img.xkw.com/dksih/QBM/2016/3/2/1572513484677120/1572513490944000/STEM/28025452294846dfb1b165c19ea180c9.png)
![](https://img.xkw.com/dksih/QBM/2016/3/2/1572513484677120/1572513490944000/STEM/9de6d5bbac0b452fbc9756937d0972d0.png)
![](https://img.xkw.com/dksih/QBM/2016/3/2/1572513484677120/1572513490944000/STEM/31009b9b-0f9d-448e-8456-482b60d5805f.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2016/3/2/1572513484677120/1572513490944000/STEM/1d286809ecd4419a9c2a2ce0871a1e3b.png)
![](https://img.xkw.com/dksih/QBM/2016/3/2/1572513484677120/1572513490944000/STEM/80fd8f35540f409c98cf856f2826c72c.png)
(2)求证:BC1∥平面A1CD;
(3)若AB=1,AA1=
![](https://img.xkw.com/dksih/QBM/2016/3/2/1572513484677120/1572513490944000/STEM/40fcb476a59e4e5aa3965259c658df9c.png)
您最近一年使用:0次
5 . 如图,在四棱锥
中,平面
平面
,
∥![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493226098688/1572493232242688/STEM/b2cf2fca1082433ca91c134f3bb9b508.png)
是正三角形,已知![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493226098688/1572493232242688/STEM/589c0c9a3fa84c0ab19a612e26c970f9.png)
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493226098688/1572493232242688/STEM/86593ca99a5f4adda59dcc0938c974ee.png)
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493226098688/1572493232242688/STEM/d78144fd8a4c4261a40844c1b205d218.png)
(1)设
是
上的一点,求证:平面
平面
;
(2)求四棱锥
的体积.
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493226098688/1572493232242688/STEM/9e337a67334a41159782891aff27457b.png)
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493226098688/1572493232242688/STEM/b5e49055b7674f529ebc88446f2ed01d.png)
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493226098688/1572493232242688/STEM/e5d581a2a02d4fab960cdd958f32f820.png)
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493226098688/1572493232242688/STEM/0064a35229d2494d98c6249d2541295f.png)
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493226098688/1572493232242688/STEM/b2cf2fca1082433ca91c134f3bb9b508.png)
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493226098688/1572493232242688/STEM/3b917519398c4f1695f0d9be18345b99.png)
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493226098688/1572493232242688/STEM/589c0c9a3fa84c0ab19a612e26c970f9.png)
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493226098688/1572493232242688/STEM/86593ca99a5f4adda59dcc0938c974ee.png)
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493226098688/1572493232242688/STEM/d78144fd8a4c4261a40844c1b205d218.png)
(1)设
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493226098688/1572493232242688/STEM/4fdaf589a82b492886392aad90b157fd.png)
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493226098688/1572493232242688/STEM/f0e84cbbd2a14256a4b23a8002631902.png)
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493226098688/1572493232242688/STEM/9b54993509b848eab9a21711797fa09a.png)
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493226098688/1572493232242688/STEM/fc19d65674a64fe7b9233bfa3dcfe9a2.png)
(2)求四棱锥
![](https://img.xkw.com/dksih/QBM/2016/2/23/1572493226098688/1572493232242688/STEM/9e337a67334a41159782891aff27457b.png)
您最近一年使用:0次
6 . 在如图所示的空间几何体中,平面
平面
,
与
是边长为
的等边三角形,
,
和平面
所成的角为
,且点
在平面
上的射影落在
的平分线上.
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571952773652480/1571952779616256/STEM/729a0642325f4332a3b246558ef4be65.png)
(Ⅰ)求证:
平面
;
(Ⅱ)求三棱锥
的体积
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571952773652480/1571952779616256/STEM/8d94cb312de14a2d8bb31b99bb188f79.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571952773652480/1571952779616256/STEM/d77cdc2af6ff40b28ddb2c5ebe188de5.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571952773652480/1571952779616256/STEM/d5504b6ac1c44c68b885d70e7d66b11c.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571952773652480/1571952779616256/STEM/4d883e04136943c6be22012e2abf2fb1.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571952773652480/1571952779616256/STEM/db5effdfa6c644b89d27007865bf3131.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571952773652480/1571952779616256/STEM/2f34d3e5d97140169ac2908e4fb06a63.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571952773652480/1571952779616256/STEM/5f0713cfaf6f4a4d8afaf829eb3b30dd.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571952773652480/1571952779616256/STEM/d77cdc2af6ff40b28ddb2c5ebe188de5.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571952773652480/1571952779616256/STEM/eb3b103a88544597b735ffeb9b7508cd.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571952773652480/1571952779616256/STEM/21591274be7448b0a7420679d57b88f0.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571952773652480/1571952779616256/STEM/d77cdc2af6ff40b28ddb2c5ebe188de5.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571952773652480/1571952779616256/STEM/2c4da7351f774a048fd419f4d0f568e0.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571952773652480/1571952779616256/STEM/729a0642325f4332a3b246558ef4be65.png)
(Ⅰ)求证:
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571952773652480/1571952779616256/STEM/68d869f0fde24661919c0ebd638c81fe.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571952773652480/1571952779616256/STEM/d77cdc2af6ff40b28ddb2c5ebe188de5.png)
(Ⅱ)求三棱锥
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571952773652480/1571952779616256/STEM/67fdcdd121b749849222e1ba16640420.png)
您最近一年使用:0次