名校
解题方法
1 . 如图所示,正方体
的棱长为
,
分别为
的中点.则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/3b61fe73-c13a-42e7-b84b-c18581a360c8.png?resizew=185)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd694ad3a4733c7c84aaa7946aeea4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c013fe68d73441990aa11da1737c4805.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee0eeef2ce12bb9df07327a650de0ba2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/3b61fe73-c13a-42e7-b84b-c18581a360c8.png?resizew=185)
A.直线![]() | B.直线![]() |
C.平面AEF截正方体所得的截面面积为18 | D.点![]() ![]() |
您最近一年使用:0次
2021-07-26更新
|
268次组卷
|
2卷引用:江西省临川一中暨临川一中实验学校2022-2023学年高二4月月考数学试题
2 . 在正三棱柱
中,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/27e811de-5605-45cd-8b0d-5f169a7cc0c3.png?resizew=196)
(1)求证:平面
平面
;
(2)若
.
①求直线
与平面
所成角的正弦值;
②求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/27e811de-5605-45cd-8b0d-5f169a7cc0c3.png?resizew=196)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b9a3f868837555eb40234b3375f4a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f96c673a2381f118ea2d3efc0bca1f3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4032f71171b127da8ca7748e27580e57.png)
①求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba9e20d667d04bf3ee7f55cc795ce01.png)
②求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba9e20d667d04bf3ee7f55cc795ce01.png)
您最近一年使用:0次
2021-07-18更新
|
834次组卷
|
5卷引用:江西省赣州市赣县第三中学2021-2022学年高二9月考试数学(文)试题
江西省赣州市赣县第三中学2021-2022学年高二9月考试数学(文)试题江西省赣州市赣县第三中学2021-2022学年高二9月考试数学(理)试题湖北省仙桃中学、天门中学2021-2022学年高二上学期9月月考数学试题(A卷)重庆市复旦中学2020-2021学年高一下学期期末数学试题(已下线)第八章 立体几何初步(压轴题专练)-单元速记·巧练(人教A版2019必修第二册)
名校
3 . 如图,矩形ABCD中,AB=2AD,E为边AB的中点.将
ADE沿直线DE翻折成
A1DE(A1
平面BCDE).若M在线段A1C上(点M与A1,C不重合),则在
ADE翻折过程中,给出下列判断:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/6c74a8b1-9cce-4664-af4e-7f1442648b97.png?resizew=223)
①当M为线段A1C中点时,|BM|为定值;
②存在某个位置,使DE
A1C;
③当四棱锥A1—BCDE体积最大时,点A1到平面BCDE的距离为|A1H|(DE的中点为H);
④当二面角A1—DE—B的大小为
时,异面直线A1D与BE所成角的余弦值为
.
其中判断正确的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e581739cffb5676d997a58ab10d58880.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/6c74a8b1-9cce-4664-af4e-7f1442648b97.png?resizew=223)
①当M为线段A1C中点时,|BM|为定值;
②存在某个位置,使DE
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
③当四棱锥A1—BCDE体积最大时,点A1到平面BCDE的距离为|A1H|(DE的中点为H);
④当二面角A1—DE—B的大小为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/457eed9a9809a61c38d9143c00d311b5.png)
其中判断正确的个数为( )
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
2021-07-04更新
|
1216次组卷
|
2卷引用:江西省吉安市第一中学2021-2022学年高二10月第一次段考数学(理)试题
名校
解题方法
4 . 四棱锥
中,
平面
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/3ee80563-15d8-424a-91fd-fee8f3ad9131.png?resizew=144)
(1)求证:
;
(2)
为
中点,求
到平面
的距离.
![](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/829018a6ca0aff95d89e3f7cd943274e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62526e69e7c4e59d9df8a5b2c2426400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/3ee80563-15d8-424a-91fd-fee8f3ad9131.png?resizew=144)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d50a68fed1c23837d1267bdda5c1962.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
您最近一年使用:0次
2021-05-16更新
|
1055次组卷
|
4卷引用:江西省南昌市进贤县第一中学2020-2021学年高二下学期第二次月考数学(文)试题
5 . 在
中,
,
,
,M为
的中点,将
沿
折起,使点A,B间的距离为
,则点M到平面
的距离为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d3c9ce32b721995f355eea411340e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f955e5cc9f108de6f3ca01e5eb84c52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
A.![]() | B.![]() | C.1 | D.![]() |
您最近一年使用:0次
2021-05-11更新
|
173次组卷
|
3卷引用:江西师范大学附属中学2020-2021学年高二4月月考数学(文)试题
6 . 在斜三棱柱
中,
,
平面
,E,F分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/2021/5/7/2716118902046720/2718099499622400/STEM/4979b066-68f8-4f92-b04c-5d7c624eaaae.png?resizew=287)
(1)求证:
平面
;
(2)已知
,斜三棱柱
的体积为8,求点E到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e89195bacd53d43195e70c12b5cfa041.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://img.xkw.com/dksih/QBM/2021/5/7/2716118902046720/2718099499622400/STEM/4979b066-68f8-4f92-b04c-5d7c624eaaae.png?resizew=287)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3e9ef3e849788645552cfb0735d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d37730e89acf607fc2559f43e92b0c8.png)
您最近一年使用:0次
2021-05-10更新
|
1122次组卷
|
4卷引用:江西省九江第一中学2021届高三5月适应性考试数学(文)试题
名校
解题方法
7 . 已知平面四边形
中,
,
,现将
沿
折起,使得点
移至点
的位置(如图),且
.
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712413680951296/2715392182124544/STEM/4012a015b4084cccbb6997b0b106a3a5.png?resizew=187)
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712413680951296/2715392182124544/STEM/349dae50c2c745009855d3ad0bcbc7e9.png?resizew=177)
(1)求证:
;
(2)若
为
的中点,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c2539dc18fc736983e69dcc4a2b2f93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed66431681da1db8f7cb0f40cd19201.png)
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712413680951296/2715392182124544/STEM/4012a015b4084cccbb6997b0b106a3a5.png?resizew=187)
![](https://img.xkw.com/dksih/QBM/2021/5/2/2712413680951296/2715392182124544/STEM/349dae50c2c745009855d3ad0bcbc7e9.png?resizew=177)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0530f462e5ec1e58c46e1f7644d0cc21.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af68a7bf0da4f7c6f739d2e2461ad9b7.png)
您最近一年使用:0次
2021-05-06更新
|
761次组卷
|
3卷引用:江西省贵溪市实验中学高中部2020-2021学年高一下学期第三次月考数学试题
江西省贵溪市实验中学高中部2020-2021学年高一下学期第三次月考数学试题安徽省蚌埠市2021届下学期高三第三次教学质量检查文科数学试题(已下线)专题10 空间位置关系的判断与证明-2022年高考数学毕业班二轮热点题型归纳与变式演练(新高考专用)
名校
解题方法
8 . 如图,四棱锥
中,平面
底面ABCD,
是等边三角形,底面ABCD为梯形,且
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/3ef54571-0ce4-45a2-a19e-d531d46feedc.png?resizew=177)
(1)证明:
;
(2)求A到平面PBD的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19ad6a0124359e8b9f7649cf0bff51ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36aae82d53f2a35d2f95f467bd5b76cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa3f8ecc57e62a8ef9b5be34ea6c963c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/3ef54571-0ce4-45a2-a19e-d531d46feedc.png?resizew=177)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5d56d8170b764b80a672cd6c861921.png)
(2)求A到平面PBD的距离.
您最近一年使用:0次
2021-02-28更新
|
364次组卷
|
14卷引用:江西省南昌市第十中学2022届高三下学期第一次月考数学(文)试题
江西省南昌市第十中学2022届高三下学期第一次月考数学(文)试题四川省宜宾市叙州区第二中学校2019-2020学年高三下学期第二次月考数学(文)试题四川省简阳市阳安中学2020-2021学年高三10月月考数学(文)试题新疆实验中学2021届高三10月月考数学试题河北省邯郸市大名县一中2020-2021学年高二(实验班)上学期10月半月考数学试题贵州省黔西南州金成实验学校2023-2024学年高二上学期第一次月考数学试题【全国校级联考】重庆市中山外国语学校2019届高三上学期开学考试(9月)数学(文)试题东北师范大学附属中学2018届高三第五次模拟考试数学(文科)试题【全国百强校】辽宁省大连八中2019届高三(上)期中数学试题(文科)福建省漳州市2019届高三毕业班高考模拟(一)试卷数学(文)试题四川省成都七中2020-2021学年高三入学考试数学文科试题四川省成都市第七中学2020-2021学年高三上学期开学考试数学(文)试题安徽省滁州市定远县育才学校2021届高三下学期开学考试数学(文)试题辽宁省阜新市第二高级中学2022-2023学年高二上学期期中数学试题
名校
解题方法
9 . 如图,在直三棱柱
中,
,
,
,
为棱
的中点,
为
上一点.
![](https://img.xkw.com/dksih/QBM/2021/2/26/2666220486434816/2666505059844096/STEM/a68e3f31-4891-4d9c-bfdd-7eb98edaf971.png)
(Ⅰ)证明:
;
(Ⅱ)求
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f656e1d1f68954e5f06de8958f6a9310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16cfb38323095090b0fe5eee70b24210.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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/2021/2/26/2666220486434816/2666505059844096/STEM/a68e3f31-4891-4d9c-bfdd-7eb98edaf971.png)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7209f2bea314c5e144b11eb5f8d79ee4.png)
(Ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bba99277e38f8d9f817a9d7db8198219.png)
您最近一年使用:0次
2021-02-26更新
|
171次组卷
|
3卷引用:江西省吉安市遂川中学2021届高三下学期阶段性测试(四)数学(文)试题
江西省吉安市遂川中学2021届高三下学期阶段性测试(四)数学(文)试题(已下线)天一大联考2021届高三下学期阶段检测(四)文科数学试题河南省十所名校2020-2021学年高中毕业班阶段性测试数学文科(四)试题
名校
解题方法
10 . 如图,正三棱柱
的棱长均为2,M是侧棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/bc0b7dcd-31ec-4425-b82f-6dca32965018.png?resizew=148)
(1)在图中作出平面
与平面
的交线l(简要说明),并证明
平面
;
(2)求点C到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/bc0b7dcd-31ec-4425-b82f-6dca32965018.png?resizew=148)
(1)在图中作出平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fed2f706801662432b68797e72647c6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9df740160690029ac1e730c85f20347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8b5a6dbcf05f572f83f51abf7d668c.png)
(2)求点C到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fed2f706801662432b68797e72647c6e.png)
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2021-01-29更新
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