1 . 在直四棱柱
中,底面ABCD为平行四边形,
,
,
,
,过点B作平面截四棱柱所得截面为正方形,该平面交棱
于点M,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19fc9f894312e55c87a0d6737080e233.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dca20c8fe7d811bdb693b2cc1970a46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c55e5f19268956dbcf8d0ce79a31db2.png)
A.2 | B.3 | C.4 | D.5 |
您最近一年使用:0次
名校
2 . 已知平面
,三条不同直线
,
,
,下列四个选项中,正确的是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.若![]() ![]() ![]() | B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() | D.若![]() ![]() ![]() |
您最近一年使用:0次
名校
3 . 在空间中,下列命题中为真命题的是
A.垂直于同一直线的两条直线平行 | B.平行于同一平面的两条直线平行 |
C.垂直于同一平面的两个平面平行 | D.平行于同一平面的两个平面平行 |
您最近一年使用:0次
4 . 如图所示的几何体P—ABCD中,四边形ABCD为菱形,∠ABC=120°,AB=a,PB=
a,PB⊥AB,平面ABCD⊥平面PAB,AC∩BD=O,E为PD的中点,G为平面PAB内任一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/a5282e53-3ac8-417e-83c4-54cf3853eb91.png?resizew=161)
(1)在平面PAB内,过G点是否存在直线l使OE∥l?如果不存在,请说明理由,如果存在,请说明作法;
(2)过A,C,E三点的平面将几何体P—ABCD截去三棱锥D—AEC,求剩余几何体AECBP的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/a5282e53-3ac8-417e-83c4-54cf3853eb91.png?resizew=161)
(1)在平面PAB内,过G点是否存在直线l使OE∥l?如果不存在,请说明理由,如果存在,请说明作法;
(2)过A,C,E三点的平面将几何体P—ABCD截去三棱锥D—AEC,求剩余几何体AECBP的体积.
您最近一年使用:0次
2019-12-05更新
|
255次组卷
|
9卷引用:辽宁省2020届高三(5月份)高考数学(文科)押题试题
辽宁省2020届高三(5月份)高考数学(文科)押题试题河北省衡水中学2017届高三押题II卷文数试卷河北省衡水中学2018年高考押题(二)文科数学(已下线)河北省衡水中学2019年高考押题数学(文)试题(二)【全国百强校】山东省淄博实验中学2019届高三第二学期第一次(4月)教学诊断考试数学(文)试题(已下线)专题8.6 立体几何 (单元测试)(测)【文】-《2020年高考一轮复习讲练测》(已下线)专题8.6 立体几何(单元测试)(测)-江苏版《2020年高考一轮复习讲练测》(已下线)专题20+立体几何综合-2020年高考数学(文)母题题源解密(全国Ⅱ专版)(已下线)专题20 立体几何综合-2020年高考数学(文)母题题源解密(全国Ⅱ专版)
5 . 给出下列关于互不相同的直线
、
、
和平面
、
的四个命题:
① 若
,
,点
,则
与
不共面;
② 若
、
是异面直线,
,
,且
,
,则
;
③ 若
,
,
,则
;
④ 若
,
,
,
,
,则
,
其中为真命题的是
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/f2ef2aeb24204b28a74da363b2b14927.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/78f4b3a3a1864f16920d8f2b1ff2062e.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/e87b15c4bf2641dd8c60cd2074bf2103.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/c55b98e3f57640e6b577a5a66f1df424.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/e4342e7e487e4f63b07e31fcb9e133c6.png)
① 若
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/51489cc81da54a87a2b912db83a20922.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/39bd13c6302942b5bc0a72027f431005.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/18fb4a2619eb40ec8af3fd2197a32476.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/78f4b3a3a1864f16920d8f2b1ff2062e.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/f2ef2aeb24204b28a74da363b2b14927.png)
② 若
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/f2ef2aeb24204b28a74da363b2b14927.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/78f4b3a3a1864f16920d8f2b1ff2062e.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/e0dda33ffd92429aaa639a1f77561cec.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/2bffe43ae19a4c2181b7f126bbf957e5.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/c4a03772dbcc4ab8a36035ff195b603d.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/da1afb4d19de4486934ac39379d38031.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/2ced986b44aa4f0a8555423ef60532c7.png)
③ 若
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/e0dda33ffd92429aaa639a1f77561cec.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/5ddf923cb54a4df58589029903c0d70f.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/5daeea00fb2346e1b13f8a7bd8ca63e3.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/41055ad0658f432abdaeb149f37f4ffc.png)
④ 若
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/f1038799877c436fbccf38992d707395.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/51489cc81da54a87a2b912db83a20922.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/864dd91cad914894a47ab0d0539ad10a.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/d8ddf1f2ed5d47099a3d4d1d1e040641.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/5ddf923cb54a4df58589029903c0d70f.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572087244324864/1572087250108416/STEM/5daeea00fb2346e1b13f8a7bd8ca63e3.png)
其中为真命题的是
A.①③④ | B.②③④ | C.①②④ | D.①②③ |
您最近一年使用:0次
2016-12-03更新
|
1209次组卷
|
3卷引用:2015届辽宁省朝阳市三校协作体高三下学期第一次模拟考试理科数学试卷
6 .
为等腰直角三角形,
,
,
、
分别是边
和
的中点,现将
沿
折起,使面![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/7c0a3b96b2704a378424003cda47dac5.png)
面
,
、
分别是边![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/9073703c7f8b4e7987d47774e2d71649.png)
和
的中点,平面
与
、
分别交于
、
两点.
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/537ac35fcb364ef4a7945ae57a82740f.png)
(Ⅰ)求证:![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/22761db4c74a462ea2b9ac8d7187f439.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/b850280235184247aba1a866facdbf6c.png)
;
(Ⅱ)求二面角
的余弦值;
(Ⅲ)求
的长.
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/b4bf254e014e43f295613df576170bc3.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/16015fc0d5ef4d52830219ce5aa2e55b.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/ed4cd6243c204cfca6b5d85306cfc129.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/6c76f5f6cbed4ea3ac9fa0d4e94bee88.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/584216596a3442b38dd04f1d109ae3e0.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/df5d2181513b4cfe9da005784ef6fb18.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/b2e69dfbe1ec47feb68aa3b93732102d.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/cc320511a05b43c6be999f9b151b509a.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/2f9903e0949d4c2897d10f885fae1497.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/7c0a3b96b2704a378424003cda47dac5.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/7e1c14b8d3dc4feeb62318a3bffc7b76.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/a9903f5e9f424a02b90dea213222aa6c.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/be3bf612969b4eec9cf0851c418fd09f.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/4a8eef49b2cf418c8bf4fe7bbc0c85b6.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/9073703c7f8b4e7987d47774e2d71649.png)
和
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/6415c7377faf479283d02ee980a254cb.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/a2e5c056e8264f8d8a33bdf39ddae40e.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/0bc260db9552485389e66dc55a5bdf52.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/3dc3e18cdb074fd1a21e9be06540bf6c.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/8b0db28dba0d4655a6ee066ff0a94faa.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/a2d3f97aa904438ab15eb93ee47c832b.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/537ac35fcb364ef4a7945ae57a82740f.png)
(Ⅰ)求证:
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/22761db4c74a462ea2b9ac8d7187f439.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/b850280235184247aba1a866facdbf6c.png)
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/ec7e687c076e4cadab8ca1e41d50d6e2.png)
(Ⅱ)求二面角
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/1f30f7eae31c48f58550ada1adb8fbeb.png)
(Ⅲ)求
![](https://img.xkw.com/dksih/QBM/2015/4/29/1572086904897536/1572086911066112/STEM/c575477ce3d141beb836538e68809593.png)
您最近一年使用:0次
7 . 如图,在斜三棱柱
中,点
、
分别是
、
的中点,
平面
.已知
,
.
(Ⅰ)证明:
平面
;
(Ⅱ)求异面直线
与
所成的角;
(Ⅲ)求
与平面
所成角的正弦值.
![](https://img.xkw.com/dksih/QBM/2012/5/17/1570857997066240/1570858002644992/STEM/91ffa8d8593e4287921f830254edcace.png)
![](https://img.xkw.com/dksih/QBM/2012/5/17/1570857997066240/1570858002644992/STEM/4f4e3f8324734bc48f14f800248e3340.png)
![](https://img.xkw.com/dksih/QBM/2012/5/17/1570857997066240/1570858002644992/STEM/4d3134e3d2af4a508a1238d59643f92c.png)
![](https://img.xkw.com/dksih/QBM/2012/5/17/1570857997066240/1570858002644992/STEM/7ec613da115c4de2bc173c6212f9cc9e.png)
![](https://img.xkw.com/dksih/QBM/2012/5/17/1570857997066240/1570858002644992/STEM/6c237290e46e4465980240250f157482.png)
![](https://img.xkw.com/dksih/QBM/2012/5/17/1570857997066240/1570858002644992/STEM/83e194d0c04147a0b55a7b1eabceca0e.png)
![](https://img.xkw.com/dksih/QBM/2012/5/17/1570857997066240/1570858002644992/STEM/2fedb5418ea044adb6f840439cdd0cee.png)
![](https://img.xkw.com/dksih/QBM/2012/5/17/1570857997066240/1570858002644992/STEM/4e08a720d1bd42ebaf1fa9e030fac067.png)
![](https://img.xkw.com/dksih/QBM/2012/5/17/1570857997066240/1570858002644992/STEM/864fe98b347d4ef798f77c46d082c46b.png)
(Ⅰ)证明:
![](https://img.xkw.com/dksih/QBM/2012/5/17/1570857997066240/1570858002644992/STEM/be508542a0ed4a47b308c7d3817e6d1c.png)
![](https://img.xkw.com/dksih/QBM/2012/5/17/1570857997066240/1570858002644992/STEM/8b572b7dc87d47aa90e5cab13e78cecf.png)
(Ⅱ)求异面直线
![](https://img.xkw.com/dksih/QBM/2012/5/17/1570857997066240/1570858002644992/STEM/a3a38c3610dc4bcd952d85820315d193.png)
![](https://img.xkw.com/dksih/QBM/2012/5/17/1570857997066240/1570858002644992/STEM/f0dfb3586a38464bb9a47901d98a7286.png)
(Ⅲ)求
![](https://img.xkw.com/dksih/QBM/2012/5/17/1570857997066240/1570858002644992/STEM/7ec613da115c4de2bc173c6212f9cc9e.png)
![](https://img.xkw.com/dksih/QBM/2012/5/17/1570857997066240/1570858002644992/STEM/3da1a3882d214ec8a028bd44f466ad34.png)
![](https://img.xkw.com/dksih/QBM/2012/5/17/1570857997066240/1570858002644992/STEM/38506a19cae3487bac38489e1502e4e9.png)
您最近一年使用:0次