1 . 在三棱锥
中,
和
都是边长为
的等边三角形,
,
分别是
的中点.
(1)求证:
平面
;
(2)求证:平面
平面
;
(3)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89b9ff626c7739277fd1f69fac48dc1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5fbb384c1e32901773798f71be6dfec.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6748d9b9948485c5ba87ca8751c6e053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(3)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf9718967af7a01c5b4866ea6f73bbb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/2b12d2e0-4974-4ae3-9248-a6b1f34de435.png?resizew=156)
您最近一年使用:0次
2016-12-02更新
|
881次组卷
|
6卷引用:2012-2013学年广东省广州六中高二上学期期末考试文科数学试卷
(已下线)2012-2013学年广东省广州六中高二上学期期末考试文科数学试卷(已下线)2013届广东省吴川四中高三8月摸底考试文科数学试卷(已下线)2011—2012学年福建省泉州市一中高三上学期期中文科数学试卷北京市十一学校2016-2017学年高二上学期期中考试数学(文)试题北京市十一学校2016-2017学年高二上学期期中考试数学(理)试题北京市大峪中学2023-2024学年高二上学情期中考试数学试题
2 . 如图所示的长方体
中,底面
是边长为2的正方形,
为
与
的交点,
,
是线段
的中点.请建立空间直角坐标系解决以下问题:
![](https://img.xkw.com/dksih/QBM/2012/2/17/1570744390410240/1570744395890688/STEM/0543faff439448d48c4d1d1433fe873f.png?resizew=225)
(1)求证:
平面
;
(2)求证:
平面
;
(3)求二面角
的大小.
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/908fdbef8613f4baaeb7524b84c07389.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://img.xkw.com/dksih/QBM/2012/2/17/1570744390410240/1570744395890688/STEM/0543faff439448d48c4d1d1433fe873f.png?resizew=225)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2061b9ab3862d9c36d32c4ffef91145a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fefd8229243bcbee5ac197740e6c66ab.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1513526394db145397593dab4e327820.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a211ad5a06b505b8365a62c1946f3cb7.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cce41e25707608fa6136f798c6ff94d.png)
您最近一年使用:0次
12-13高三上·广东中山·期末
解题方法
3 . 在棱长为a的正方体ABCD﹣A1B1C1D1中,E是线段A1C1的中点,AC∩BD=F.
(1)求证:CE⊥BD;
(2)求证:CE∥平面A1BD;
(3)求三棱锥D﹣A1BC的体积.
(1)求证:CE⊥BD;
(2)求证:CE∥平面A1BD;
(3)求三棱锥D﹣A1BC的体积.
![](https://img.xkw.com/dksih/QBM/2012/2/1/1570709563621376/1570709568626688/STEM/7b6e9102252643eb8b744d1c6f6d3fd1.png?resizew=200)
您最近一年使用:0次
12-13高二上·广东湛江·期末
解题方法
4 . 如图,正方体
的棱长为a,E为
的中点.
(1)求证:
//平面
;(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca48c18021e7be4bbb3e95576e1c1b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca48c18021e7be4bbb3e95576e1c1b5f.png)
![](https://img.xkw.com/dksih/QBM/2012/1/16/1570692813488128/1570692818944000/STEM/c3301b06f4eb4e1584af8910a99fa3f6.png?resizew=189)
您最近一年使用:0次
11-12高三上·广东中山·期末
解题方法
5 . 如图,已知四棱锥
中,底面
是直角梯形,
,
,
,
,
平面
,
.
![](https://img.xkw.com/dksih/QBM/2011/2/19/1570002572820480/1570002577965056/STEM/d09771798a7a4ecba9ba74897b2f4f47.png?resizew=228)
(1)求证:
平面
;
(2)求证:
平面
;
(3)若M是PC的中点,求三棱锥M—ACD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/68d31600cba2d5256c7e78b6122d6755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1602c3d3e9628cd503a443024410e87a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e2a44d05b1d387150c4b359e021ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.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/fcc532cfe64300cb3da9e04a307c957a.png)
![](https://img.xkw.com/dksih/QBM/2011/2/19/1570002572820480/1570002577965056/STEM/d09771798a7a4ecba9ba74897b2f4f47.png?resizew=228)
(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/0628681907ac8d7fdb94d8bc1b15feb9.png)
(3)若M是PC的中点,求三棱锥M—ACD的体积.
您最近一年使用:0次
6 . 如图所示,在直三棱柱
中,
,
,
,点
是
的中点.
;
(2)求证:
平面
;
(3)求异面直线
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4123dd2be67e7febc50d83eee589e657.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/429228f882da65a8e0064c88d02b8e40.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4557a368725226f2c8ea2efb7d30e478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbc7e774e4ae40c23bf4ceed179230ca.png)
(3)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
您最近一年使用:0次
2016-11-30更新
|
1414次组卷
|
17卷引用:广东省深圳市红岭中学2017-2018学年高一年级1月数学试题
广东省深圳市红岭中学2017-2018学年高一年级1月数学试题广东省深圳红岭中学2017-2018学年高一上学期期末数学试题(已下线)河北省邯郸市2009-2010学年度高二第二学期期末教学质量检测(已下线)2010-2011学年吉林省长春外国语学校高二下学期期末考试理数(已下线)2010-2011学年吉林省长春外国语学校高二下学期期末考试文数(已下线)2013届广东省连州市连州中学高三8月月考理科数学试卷云南省宣威五中2017-2018学年高一下学期期末考试数学(理)试卷新疆乌鲁木齐市第七十中学2018-2019学年高一下学期期末数学(理)试题河北省石家庄市藁城区新冀明中学2021届高三质量检测数学试题2015-2016学年湖南省常德市一中高一12月月考数学试卷福建省莆田市仙游第一中学2017-2018学年高一上学期第二次(12月)月考数学试题山西省大同市2020届高三开学考试数学文科试题河南省周口市项城三高2019-2020学年高一上学期第三次考试数学试题四川省江油中学2019-2020学年高一下学期第三次月考数学试题宁夏银川三沙源上游学校2020-2021学年高一下学期第一次月考数学(文)试题2005年普通高等学校招生考试数学(文)试题(北京卷)湖南省常德市第一中学2023-2024学年高一下学期期中考试数学试题
7 .
如图,三角形ABC中,AC=BC=
,四边形ABED是正方形,平面ABED⊥底面ABC,若G、F分别是EC、BD的中点.
(1)求证:GF//底面ABC;
(2)求证:AC⊥平面EBC;
(3)若正方形ABED的边长为1,求几何体ADEBC的体积.
如图,三角形ABC中,AC=BC=
![](https://img.xkw.com/dksih/QBM/2011/12/10/1570568744722432/1570568750071808/STEM/7e09b1f4474d4f2eb03a24c58de6dce3.png)
(1)求证:GF//底面ABC;
(2)求证:AC⊥平面EBC;
(3)若正方形ABED的边长为1,求几何体ADEBC的体积.
![](https://img.xkw.com/dksih/QBM/2011/12/10/1570568744722432/1570568750071808/STEM/8863295ae71243e1bc692f5cf38705fb.png)
您最近一年使用:0次
8 . 如图(1),在直角梯形
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a3d6e7d2a265fc41049e7a09752a45.png)
、
、
分别是线段
、
、
的中点,现将
折起,使平面
平面
(如图(2)).
![](https://img.xkw.com/dksih/QBM/2011/8/2/1570277607022592/1570277612519424/STEM/5b5f04f22cda4b979c0e1f00f76a2c19.png?resizew=148)
(Ⅰ)求证:
平面
;
(Ⅱ)取
中点为
,求证:
平面
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b027ed57b9c6f24e27ec0ae282c76efa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a3d6e7d2a265fc41049e7a09752a45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92acd8432e571e2f30a95c0a7d697349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36aae82d53f2a35d2f95f467bd5b76cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ad6a0124359e8b9f7649cf0bff51ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2011/8/2/1570277607022592/1570277612519424/STEM/5b5f04f22cda4b979c0e1f00f76a2c19.png?resizew=148)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6d4dcf1174004f215d71472006c3638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
(Ⅱ)取
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5d8073385db872410ca88187bbb0d34.png)
您最近一年使用:0次
9 . 已知一几何体的三视图如图(甲)示.(三视图中已经给出各投影面顶点的标记)
![](https://img.xkw.com/dksih/QBM/2011/7/19/1570268283199488/1570268288532480/STEM/305916ebfe694bfea0c1dd8613cf874e.png?resizew=270)
(1)在已给出的一个面上(图乙),画出该几何体的直观图;
(2)设点F、H、G分别为
的中点,求证:
平面
;
(3)求该几何体的体积.
![](https://img.xkw.com/dksih/QBM/2011/7/19/1570268283199488/1570268288532480/STEM/305916ebfe694bfea0c1dd8613cf874e.png?resizew=270)
(1)在已给出的一个面上(图乙),画出该几何体的直观图;
(2)设点F、H、G分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f428a6c35aabf61fb9d3a760dfca3aae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a779876cdfb2c489ad0eaed0f73e6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
(3)求该几何体的体积.
您最近一年使用:0次
11-12高一上·广东东莞·期末
解题方法
10 . 如图,正方形
的边长为1,正方形
所在平面与平面
互相垂直,
是
的中点.
(1)求证:
平面
;
![](https://img.xkw.com/dksih/QBM/2011/2/22/1570005425086464/1570005430362112/STEM/d6c5a08cbae746979405ee12c3f845d3.png)
(2)求证:
;
(3)求三棱锥
的体积.
![](https://img.xkw.com/dksih/QBM/2011/2/22/1570005425086464/1570005430362112/STEM/90cd07ee6933459d874efbbf13591d41.png)
![](https://img.xkw.com/dksih/QBM/2011/2/22/1570005425086464/1570005430362112/STEM/e6b6b9bdc79d4f94927976d669a4d5b0.png)
![](https://img.xkw.com/dksih/QBM/2011/2/22/1570005425086464/1570005430362112/STEM/90cd07ee6933459d874efbbf13591d41.png)
![](https://img.xkw.com/dksih/QBM/2011/2/22/1570005425086464/1570005430362112/STEM/250059b13f2440eeb25da7eed33a2236.png)
![](https://img.xkw.com/dksih/QBM/2011/2/22/1570005425086464/1570005430362112/STEM/6c6f24b8ed1b4980be4017bdda08d3b0.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2011/2/22/1570005425086464/1570005430362112/STEM/9fe00274328b462192303570b05359cb.png)
![](https://img.xkw.com/dksih/QBM/2011/2/22/1570005425086464/1570005430362112/STEM/da0cee6af4ab4ea49d5f1d02e1465167.png)
![](https://img.xkw.com/dksih/QBM/2011/2/22/1570005425086464/1570005430362112/STEM/d6c5a08cbae746979405ee12c3f845d3.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8c7274d4381e1cdd7483a543b1fde7c.png)
(3)求三棱锥
![](https://img.xkw.com/dksih/QBM/2011/2/22/1570005425086464/1570005430362112/STEM/eeb23cc551664abf8b835a0649a95f12.png)
您最近一年使用:0次