名校
1 . 如图,在斜三棱柱
中,点O.E分别是
、
的中点,
与
交于点F,
平![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
已知
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/5a3da2c0-0cd1-4a8f-b6a3-17d53c472252.png?resizew=198)
(1)求证:
平面
;
(2)求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce03b310edce42191f9fa75a1c909ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a3cc9cccfb4c260dac05f4ed57e8c10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29ba708880f5eb782acbf2c961c2494c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/5a3da2c0-0cd1-4a8f-b6a3-17d53c472252.png?resizew=198)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8550fbd7938e0d8639462ac52a6dad1f.png)
您最近一年使用:0次
2 . 如图,矩形
中,
为
的中点,
为
的中点,
交
于点
,将
沿直线
翻折到
,连接
,
为
的中点,则在翻折过程中,下列命题错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/23/e4a1cf8b-20ae-4c58-b92b-c3d9781cdeae.png?resizew=187)
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad09a769a75b107390b9eeccc929f761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbe40405cd7bd60d69dd535d6da85c00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/23/e4a1cf8b-20ae-4c58-b92b-c3d9781cdeae.png?resizew=187)
A.翻折过程中,始终有平面![]() ![]() |
B.存在某个位置,使得![]() |
C.若![]() ![]() |
D.翻折过程中,![]() |
您最近一年使用:0次
2020-11-22更新
|
811次组卷
|
3卷引用:安徽省蚌埠市固镇二中2020-2021学年高二上学期12月月考理科数学试题
安徽省蚌埠市固镇二中2020-2021学年高二上学期12月月考理科数学试题甘肃省永昌县第一中学2020-2021学年高三上学期第一次月考数学理试题(已下线)第八单元 立体几何(B卷 滚动提升检测)-2021年高考数学(理)一轮复习单元滚动双测卷
名校
解题方法
3 . 已知棱长为1的正方体ABCD-A1B1C1D1中,下列结论不正确 的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/ddf04ea2-19d3-48bd-8fce-fcc7c5321db1.png?resizew=167)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/ddf04ea2-19d3-48bd-8fce-fcc7c5321db1.png?resizew=167)
A.平面ACB1∥平面A1C1D,且两平面的距离为![]() |
B.点P在线段AB上运动,则四面体![]() |
C.与所有12条棱都相切的球的体积为![]() |
D.二面角![]() ![]() |
您最近一年使用:0次
4 . 如图,在正三棱柱
中,点D在边BC上,
.
![](https://img.xkw.com/dksih/QBM/2020/11/16/2594321028554752/2596154470490112/STEM/988243ca62314ecdbbd1e43fb3852736.png?resizew=131)
(1)求证:
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95c0735c263b84ae8b9891054c38f1d3.png)
(2)若点E为
的中点,求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca1ebdf74ee45f3736307d4a7e64717f.png)
![](https://img.xkw.com/dksih/QBM/2020/11/16/2594321028554752/2596154470490112/STEM/988243ca62314ecdbbd1e43fb3852736.png?resizew=131)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95c0735c263b84ae8b9891054c38f1d3.png)
(2)若点E为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2be20790549dec0f86de9804a3e7c422.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba9e20d667d04bf3ee7f55cc795ce01.png)
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解题方法
5 . 如图,在直四棱柱ABCD-A1B1C1D1中,底面ABCD为等腰梯形,AB∥CD,且AB=2CD,在棱AB上是否存在一点F,使平面C1CF∥平面ADD1A1?若存在,求点F的位置,若不存在,请说明理由.
您最近一年使用:0次
6 . 如图,在正三棱柱
中,
,F、
分别是AC、
的中点.
![](https://img.xkw.com/dksih/QBM/2020/11/3/2585045239988224/2585759430508544/STEM/868ea399f80045cc93b4050a1be25d1b.png?resizew=134)
(1)求证:平面
平面
;
(2)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede6a60cad0e0b58e1549fda6e085719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41f461f83f1e05c925ee73ff30ce68d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09a8ac969e5cec3be6abf4ff44c692e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bebb9d0950db392cbe960641f648df2.png)
![](https://img.xkw.com/dksih/QBM/2020/11/3/2585045239988224/2585759430508544/STEM/868ea399f80045cc93b4050a1be25d1b.png?resizew=134)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96da2705efbc24792365deb1dd66bf75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c37f87c2bcb44fdd7333f44c3820f43.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e77683f8c1df18c030bc680bd21e2cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce731cd45eb83b75e47e20551a97cd45.png)
您最近一年使用:0次
名校
解题方法
7 . 如图,
是边长为a的正方形,
平面
,
平面
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/12875624-055d-4fa6-8180-55ddaebe2afc.png?resizew=258)
(1)证明:平面
平面
;
(2)在
上是否存在一点G,使平面
将几何体
分成上下两部分的体积比为3∶11?若存在,求出G的位置;若不存在,说明理由;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a22d6b860f06fe23618b0d3de6768fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ba02c4ed0787d5032dcf194304a1ab0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/12875624-055d-4fa6-8180-55ddaebe2afc.png?resizew=258)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812b915a549bf052c35dcb886242f83f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/422210c777ac0d625bbd81cc7601bf9b.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1071e1d5a8f2f80c7002560d18856199.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
您最近一年使用:0次
2020-10-31更新
|
687次组卷
|
4卷引用:安徽省合肥一中2020-2021学年高二上学期10月段考数学(理)试题
安徽省合肥一中2020-2021学年高二上学期10月段考数学(理)试题山西省朔州市怀仁县大地学校2020-2021学年高二上学期第三次月考理科数学试题(已下线)考点31 直线、平面平行的判定及其性质-备战2021年高考数学(理)一轮复习考点一遍过(已下线)考点30 直线、平面平行的判定及其性质-备战2021年高考数学(文)一轮复习考点一遍过
名校
解题方法
8 . 如图,正方形
和矩形
所在平面互相垂直,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/b70209b7-1e82-43c7-8ae2-8785bc938df4.png?resizew=161)
(1)证明:平面
平面
;
(2)证明:
平面
;
(3)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4b93d7abcfc4c3df48f03aa969c17f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27ba952c1209a61b00cc62aacb367292.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/b70209b7-1e82-43c7-8ae2-8785bc938df4.png?resizew=161)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d98d25467d8a11ddeeb1e6e18eb704f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/422210c777ac0d625bbd81cc7601bf9b.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac480d8d9d7821b62a603cf5cfda236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(3)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8768996ca9a0f2c5d9a19abbd54df.png)
您最近一年使用:0次
2020-10-28更新
|
519次组卷
|
2卷引用:安徽省安庆市岳西中学2020-2021学年高二上学期第一次段考数学试题
9 . 如图,在三棱锥P-ABC中,平面
平面PBC,
,
,过A作
垂足为F,点E,G分别是棱PA,PC的中点.
![](https://img.xkw.com/dksih/QBM/2020/10/20/2575298373206016/2577441502511104/STEM/e19e2698-47bc-4d18-bcd1-58b7cd5bcd45.png?resizew=234)
(1)求证:平面
平面ABC;
(2)求证:
平面PAB.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc61de08bda0c44e06ad89d306c0bb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8cc33ee7afea61f57d8c5dc43e79596.png)
![](https://img.xkw.com/dksih/QBM/2020/10/20/2575298373206016/2577441502511104/STEM/e19e2698-47bc-4d18-bcd1-58b7cd5bcd45.png?resizew=234)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1fd975b889bfe7ddcec0de56b6f23ee.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
您最近一年使用:0次
2020-10-23更新
|
233次组卷
|
2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(文)试题
解题方法
10 . 如图(1)所示,在直角梯形
中,
,
,
,
,
、
、
分别为线段
、
、
的中点,现将
折起,使平面
平面
(图(2)).
![](https://img.xkw.com/dksih/QBM/2020/10/15/2571742180458496/2573211019378688/STEM/88c1c0debfa442a0b181e055c75b2c09.png?resizew=278)
(1)求证:平面
平面
;
(2)若点
是线段
的中点,求证:
平面
;
(3)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b027ed57b9c6f24e27ec0ae282c76efa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ace3f86d71ba55a0bd713a047e5b33c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0910601e7d760188d10beee6a48f2ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb46c641aa0616b3b09d596dda500ab.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/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/2020/10/15/2571742180458496/2573211019378688/STEM/88c1c0debfa442a0b181e055c75b2c09.png?resizew=278)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de22059d7d80f24817235269e9bb1ffe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5d8073385db872410ca88187bbb0d34.png)
(3)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4d58bf185026e4f6b568f1d5677074b.png)
您最近一年使用:0次