1 . 已知四边形
是梯形(如图甲).AB∥CD,AD⊥DC,CD=4,AB=AD=2,E为CD的中点,以AE为折痕把
折起,使点D到达点P的位置(如图乙),且PB=2.
![](https://img.xkw.com/dksih/QBM/2021/12/14/2872466576834560/2879689875202048/STEM/9a795877f6b04d77b6e867c7e10b3156.png?resizew=351)
(1)求证:平面
平面
;
(2)求点A到平面PBE的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://img.xkw.com/dksih/QBM/2021/12/14/2872466576834560/2879689875202048/STEM/9a795877f6b04d77b6e867c7e10b3156.png?resizew=351)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d96357a07048ba79b8c84097d359d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
(2)求点A到平面PBE的距离.
您最近一年使用:0次
2021-12-24更新
|
368次组卷
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7卷引用:江西省吉安市安福二中、吉安县三中、井大附中2021-2022学年高二上学期12月份三校联考数学(文)试题
名校
解题方法
2 . 如图,在斜三棱柱
中,
是
的中点,
平面
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/d0965977-06d8-472a-8070-c2e95c7690b8.png?resizew=224)
(1)求证:
⊥平面
;
(2)若
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.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/01e5981445b6f2a6c58974158d96a4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97e89a358226b4be8786077a60555c69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61ea8821d44ee1f9332096263e7508e9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/d0965977-06d8-472a-8070-c2e95c7690b8.png?resizew=224)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc9ffc43a56921fe79f8602636b8b0f.png)
您最近一年使用:0次
名校
解题方法
3 . 四棱锥P﹣ABCD中,面PAD⊥面ABCD,AB∥CD且AB⊥AD,PA=CD=2AB=2,AD=PD=
.E为PB中点.
![](https://img.xkw.com/dksih/QBM/2021/4/13/2698822586146816/2772807465926656/STEM/a3bf0d6d-3c15-429c-8b67-9b47a0b09aaf.png)
(1)求证:PA⊥面CDE;
(2)求点E到面PCD的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/2021/4/13/2698822586146816/2772807465926656/STEM/a3bf0d6d-3c15-429c-8b67-9b47a0b09aaf.png)
(1)求证:PA⊥面CDE;
(2)求点E到面PCD的距离.
您最近一年使用:0次
2021-07-26更新
|
413次组卷
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5卷引用:江西省南昌市第十中学2021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2021届高三下学期第一次月考数学(文)试题江西省丰城市第九中学2022届高三(日新部)上学期第一次月考数学(文)试题安徽省安庆市2021届高三下学期一模文科数学试题(已下线)专题29 立体几何(解答题)-2021年高考数学(文)二轮复习热点题型精选精练河南省示范性高中2021-2022学年高三下学期阶段性模拟联考三文科数学试题
4 . 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
5 . 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
6 . 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
7 . 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
8 . 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
9 . 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
10 . 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)
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