1 . 四棱锥
中,底面
是平行四边形,
是
的中点,过
的平面与
交于
.
(
) 求证:
平面
.
(
)求证:
是
中点.
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62871bb0dff211fc3bd80f9066c25b29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecaf8d068559d90824eb43b9c252a320.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62871bb0dff211fc3bd80f9066c25b29.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/2017/12/20/1842721954848768/1846054193594368/STEM/1868d50f15ae44a2944027072feaadb0.png?resizew=190)
您最近一年使用:0次
2017-12-25更新
|
524次组卷
|
4卷引用:安徽省合肥市第十一中学2020-2021学年高二上学期第一次月考数学(理)试题
安徽省合肥市第十一中学2020-2021学年高二上学期第一次月考数学(理)试题安徽省合肥市第十一中学2020-2021学年高二上学期第一次月考数学(文)试题北京市西城区育才中学2017-2018学年高二上学期期中考试数学(理)试题(已下线)2019年1月4日 《每日一题》人教必修1+必修2(上学期期末复习)直线、平面平行的判定及其性质
2 . 如图,在六面体
中,平面
平面
,
平面
,
,
,
.且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/26c3ceb4-9d6f-4e0f-82d7-72d627129950.png?resizew=163)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20e38a1b5cfffd43a3405481a1d67cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/617edf7f259f5955db7cad814af85281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65537aeb8c9defd235a2f4d7c8e16ea4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4f383b759b5207e29698e93ed86216a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/118976a4b658d9f9000bd04afc4d8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e6803767c9a4ab12aade03ff39e7782.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/26c3ceb4-9d6f-4e0f-82d7-72d627129950.png?resizew=163)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9d32e76582bf550593fdef53e081225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3df0d9a6c83b35a863544a01f22ef7.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a92daee55d5a80b73f27fb9ce7c0f34.png)
您最近一年使用:0次
名校
解题方法
3 . 如图,已知直四棱柱ABCD﹣A1B1C1D1的底面是直角梯形,AB⊥BC,AB∥CD,E,F分别是棱BC,B1C1上的动点,且EF∥CC1,CD=DD1=1,AB=2,BC=3.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/a55afa23-55a1-492a-866f-09e9e24de02d.png?resizew=234)
(1)证明:无论点E怎样运动,四边形EFD1D都为矩形;
(2)当EC=1时,求几何体A﹣EFD1D的体积.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/a55afa23-55a1-492a-866f-09e9e24de02d.png?resizew=234)
(1)证明:无论点E怎样运动,四边形EFD1D都为矩形;
(2)当EC=1时,求几何体A﹣EFD1D的体积.
您最近一年使用:0次
名校
解题方法
4 . 已知正方体
的棱长为
,点
在
上,点
在
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/4d6ebd78-a591-42ca-9852-0e898c7dbbbc.png?resizew=166)
(1)求证:
,
,
,
四点共面.
(2)若点
在
上,
,点
在
上,
,求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac9a3563f1caddb7cab6ec3f1571587c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/4d6ebd78-a591-42ca-9852-0e898c7dbbbc.png?resizew=166)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ee3e567700c1d5b17944ffc6229c78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b63aff58645743ad21bb974814af4924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53569e6ec795658b4fffcddeebe0f142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
您最近一年使用:0次
解题方法
5 . 如图,在四棱锥
中,
底面
,
,
,
,
与底面成
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/26/c6ce9510-5d54-43d8-a4ed-ab527cd3971a.png?resizew=166)
(1)求证:
∥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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6037bba27008abc96a6dba99753549ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38dc16842b3891560b9d34c7b817f9cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/26/c6ce9510-5d54-43d8-a4ed-ab527cd3971a.png?resizew=166)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7628ad58e0832bbf636e04be8b9cbfe.png)
您最近一年使用:0次
6 . 一装有水的直三棱柱
容器(厚度忽略不计),上下底面均为边长为5的正三角形,侧棱为10,侧面
水平放置,如图所示,点
,
,
,
分别在棱
,
,
,
上,水面恰好过点
,
,
,
,且
.
![](https://img.xkw.com/dksih/QBM/2018/3/6/1896263384145920/1896879809773568/STEM/24f1e279ffeb4cf6bb0e3a8e3c19bab2.png?resizew=293)
(1)证明:
;
(2)若底面
水平放置时,求水面的高.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab35850dbc661ded6456b70767cc6cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cabc3303519ac16fc998913ad9f349c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/833cfda415649b832cc136caed392753.png)
![](https://img.xkw.com/dksih/QBM/2018/3/6/1896263384145920/1896879809773568/STEM/24f1e279ffeb4cf6bb0e3a8e3c19bab2.png?resizew=293)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe7eaf967808dad0a184eeedfa27721.png)
(2)若底面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2018-03-07更新
|
322次组卷
|
2卷引用:安徽省池州市东至二中2017-2018学年高二上学期期末考试题数学(理)
7 . 一装有水的直三棱柱ABC-A1B1C1容器(厚度忽略不计),上下底面均为边长为5的正三角形,侧棱为10,侧面AA1B1B水平放置,如图所示,点D、E、F、G分别在棱CA、CB、C1B1、C1A1上,水面恰好过点D,E,F,C,且CD=2
![](https://img.xkw.com/dksih/QBM/2018/2/22/1888005674598400/1892826472972288/STEM/83b43cf64eca40b4b6bb3fbce32a3fe8.png?resizew=323)
(1)证明:DE∥AB;
(Ⅱ)若底面ABC水平放置时,求水面的高
![](https://img.xkw.com/dksih/QBM/2018/2/22/1888005674598400/1892826472972288/STEM/83b43cf64eca40b4b6bb3fbce32a3fe8.png?resizew=323)
(1)证明:DE∥AB;
(Ⅱ)若底面ABC水平放置时,求水面的高
您最近一年使用:0次
2018-03-01更新
|
235次组卷
|
2卷引用:安徽省池州市2017-2018学年高二上学期期末考试数学(文)试题
8 . 如图,在底面为直角梯形的四棱锥
中,
为
的中点,
,
,
平面
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2017/4/18/1668561566703616/1668654188552192/STEM/728d878c1fb44b0cbd2c15192e9dcf76.png?resizew=195)
(1)求证:
平面
;
(2)求直线
与平面
所成角的正弦值.
![](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/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.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/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://img.xkw.com/dksih/QBM/2017/4/18/1668561566703616/1668654188552192/STEM/728d878c1fb44b0cbd2c15192e9dcf76.png?resizew=195)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78172568aac9805d2ea2d5f742bf80c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
9 . 如图,在六面体
中,平面
平面
,
平面
,
平面
,
,且
,
.
![](https://img.xkw.com/dksih/QBM/2011/12/22/1570628813758464/1570628819214336/STEM/f9a6d72fbf6543bfb89a677329cb85ee.png?resizew=171)
(1)求证:平面
平面
;
(2)求证:
平面
;
(3)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20e38a1b5cfffd43a3405481a1d67cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/617edf7f259f5955db7cad814af85281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9beeedb7ddaac2cd3d37151d058ab7fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4f383b759b5207e29698e93ed86216a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd6ae694a4678178afc4439cc7608f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151b7172db8b4af240ef0439778d792c.png)
![](https://img.xkw.com/dksih/QBM/2011/12/22/1570628813758464/1570628819214336/STEM/f9a6d72fbf6543bfb89a677329cb85ee.png?resizew=171)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e51838e395dfc9d9ef597d9e01f46272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2257da1e2425f2ea9ac7440f52659ff.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9d32e76582bf550593fdef53e081225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3df0d9a6c83b35a863544a01f22ef7.png)
(3)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f26712d1a7a5864cd18498f16f7bd96c.png)
您最近一年使用:0次
10 . ![](https://img.xkw.com/dksih/QBM/2016/3/23/1572554353901568/1572554359767040/STEM/576eba70edcd43dc9c0cfcc2ce68afba.png?resizew=525)
从图中任选5个序号,写出其对应定理或结论.
![](https://img.xkw.com/dksih/QBM/2016/3/23/1572554353901568/1572554359767040/STEM/576eba70edcd43dc9c0cfcc2ce68afba.png?resizew=525)
从图中任选5个序号,写出其对应定理或结论.
您最近一年使用:0次