解题方法
1 . 如图所示,PA⊥平面ABCD,四边形ABCD为正方形,且E,F,G,H分别是线段PA、PD、CD、BC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/96dd8549-2b9d-4f77-b41a-d8d5d0a379e1.png?resizew=217)
(1)求证:BC∥平面EFG;
(2)DH⊥平面AEG.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/96dd8549-2b9d-4f77-b41a-d8d5d0a379e1.png?resizew=217)
(1)求证:BC∥平面EFG;
(2)DH⊥平面AEG.
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3卷引用:河北省秦皇岛市青龙满族自治县实验中学2022-2023学年高二下学期开学考试数学试题
名校
2 . 如图1,在边长为4的菱形
中,
,
于点
,将
沿
折起到
的位置,使
,如图2.
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572201374056448/1572201379930112/STEM/a99ea2a0befd4d92b37fcaf4c90b89f4.png?resizew=417)
(1)求证:
平面
;
(2)求二面角
的余弦值;
(3)判断在线段
上是否存在一点
,使平面
平面
?若存在,求出
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6906f59d09ce31956d6f5ea2b23fc77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f460edcced5597615113c0fdc95b1dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f07107087ce4abdfa5fc68fe6fb62f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967bd1d8bd38f6be7931eef41db106.png)
![](https://img.xkw.com/dksih/QBM/2015/8/6/1572201374056448/1572201379930112/STEM/a99ea2a0befd4d92b37fcaf4c90b89f4.png?resizew=417)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4525c00ed908bed8ba8d353e747a858.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a981cb7611787abb2df1e900915759.png)
(3)判断在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/339128336cb6905dc8537e58f55ad3f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e14d78cfdef4aa7d877607e7fc35b3e3.png)
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2016-12-03更新
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11卷引用:2016届河北省衡水中学高三下学期二调考试理科数学试卷
2016届河北省衡水中学高三下学期二调考试理科数学试卷2017届河北省衡水中学高三下学期第四周周测数学(理)试卷2017届河北省衡水中学高三下学期第四周周测数学(理)试卷河北省衡水中学2020届高三下学期第二次调研数学(理)试题河北省衡水中学2020届高三高考数学(理科)二调试题2017届河北省衡水中学高三下学期第四周周测数学(理)试卷2015届北京市西城区高三二模理科数学试卷(已下线)《高频考点解密》—解密16 空间向量与立体几何【全国百强校】天津市南开中学2019届高三上第二次月考数学试题(理科)(已下线)解密15 空间向量与立体几何 (讲义)-【高频考点解密】2021年高考数学(理)二轮复习讲义+分层训练陕西省安康中学2023-2024学年高二上学期10月月考数学试题
3 . 如图,正三棱柱
的所有棱长都为
,
为
中点.
![](https://img.xkw.com/dksih/QBM/2015/7/14/1572179366748160/1572179372621824/STEM/d1710d42714d43a7a5adbba6bb5e0730.png?resizew=359)
(1)求证:
面
;
(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/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/2015/7/14/1572179366748160/1572179372621824/STEM/d1710d42714d43a7a5adbba6bb5e0730.png?resizew=359)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4560fa4ad459b58b723c74bd24e51ebf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
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2016-12-03更新
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4卷引用:2014-2015学年河北正定中学高一下学期第三次月考数学卷
4 . 如图,在四棱锥
中,底面
是边长为
的正方形,
分别为
的中点,侧面
底面
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/18/a59496fe-af17-4365-a9e8-8704410f3fbe.png?resizew=183)
(1)求证:
∥平面
,
(2)求证:直线
平面
,
(3)求证:平面
平面
.
![](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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0ae9e915d670edaa52d9ad9f3f071a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb5363352988977cd5c38286b17a1097.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/18/a59496fe-af17-4365-a9e8-8704410f3fbe.png?resizew=183)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(3)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
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5 . 如图,在四棱柱ABCD-A1B1C1D1中,侧棱AA1⊥底面ABCD,AB∥DC,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ba840a2b4bf34e7461e6a9c4d658eef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b56d21fbd980ed24542d086c336623a0.png)
.
![](https://img.xkw.com/dksih/QBM/2014/8/25/1571843021512704/1571843027369984/STEM/aa3f03452f52459dac94ce014c2f34d9.png)
(Ⅰ)求证:CD⊥平面ADD1A1;
(Ⅱ)若直线AA1与平面AB1C所成角的正弦值为
,求k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ba840a2b4bf34e7461e6a9c4d658eef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b56d21fbd980ed24542d086c336623a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f957ab495b9eab7d4bc43f97613d9ad.png)
![](https://img.xkw.com/dksih/QBM/2014/8/25/1571843021512704/1571843027369984/STEM/aa3f03452f52459dac94ce014c2f34d9.png)
(Ⅰ)求证:CD⊥平面ADD1A1;
(Ⅱ)若直线AA1与平面AB1C所成角的正弦值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a4e6eb3663870ed202cc208eaf239dc.png)
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4卷引用:2015届河北省“五个一名校联盟”高三教学质量监测一理科数学试卷
(已下线)2015届河北省“五个一名校联盟”高三教学质量监测一理科数学试卷福建省莆田第二十五中学2019-2020学年高二上学期期末考试数学试题(已下线)强化卷08(3月)-冲刺2020高考数学之必拿分题目强化卷(山东专版)北师大版(2019) 选修第一册 突围者 第三章 第四节 课时3 用向量方法研究立体几何中的度量关系
6 . 如图,在三棱锥
中,
底面
,
,且
,点
是
的中点,
且交
于点
.
![](https://img.xkw.com/dksih/QBM/2016/9/28/1573046180790272/1573046187180032/STEM/1a5a0019f05847fab84c45d4a322b088.png)
(1)求证:
平面
;
(2)当
时,求三棱锥
的体积.
![](https://img.xkw.com/dksih/QBM/2016/9/28/1573046180790272/1573046187180032/STEM/c0a2efa16497475483322ef42bf3e922.png)
![](https://img.xkw.com/dksih/QBM/2016/9/28/1573046180790272/1573046187180032/STEM/3be6bdf70f3843b0954507943b4ec4d6.png)
![](https://img.xkw.com/dksih/QBM/2016/9/28/1573046180790272/1573046187180032/STEM/646b4d32035b4a4fb800d50e674f9cbe.png)
![](https://img.xkw.com/dksih/QBM/2016/9/28/1573046180790272/1573046187180032/STEM/5684b2712e3a494384c8443fe15713a9.png)
![](https://img.xkw.com/dksih/QBM/2016/9/28/1573046180790272/1573046187180032/STEM/4b76f4938f4e4412b3257e3fd7520033.png)
![](https://img.xkw.com/dksih/QBM/2016/9/28/1573046180790272/1573046187180032/STEM/1b0fc33b0e5947289b319ea8bb40102e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4db9b82b67efe45a02fca32bfcf5dc.png)
![](https://img.xkw.com/dksih/QBM/2016/9/28/1573046180790272/1573046187180032/STEM/ef5a5d085a184a4aa556e2deb662879e.png)
![](https://img.xkw.com/dksih/QBM/2016/9/28/1573046180790272/1573046187180032/STEM/5d5009981ab147b5bf73c76cc0faf8c6.png)
![](https://img.xkw.com/dksih/QBM/2016/9/28/1573046180790272/1573046187180032/STEM/ff5ff7a2f7864ba8afdcfb884b3bf960.png)
![](https://img.xkw.com/dksih/QBM/2016/9/28/1573046180790272/1573046187180032/STEM/1a5a0019f05847fab84c45d4a322b088.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2016/9/28/1573046180790272/1573046187180032/STEM/82d82bc2e25347cba3102bce85a6caea.png)
![](https://img.xkw.com/dksih/QBM/2016/9/28/1573046180790272/1573046187180032/STEM/808be44e28b34d42a6925f0c4bccf52d.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829018a6ca0aff95d89e3f7cd943274e.png)
![](https://img.xkw.com/dksih/QBM/2016/9/28/1573046180790272/1573046187180032/STEM/af17e554550a43ec9457433bef05fb70.png)
您最近一年使用:0次
2016-12-03更新
|
5517次组卷
|
3卷引用:2014届河北省邯郸市高三第二次模拟考试文科数学试卷
2012·河北石家庄·一模
7 . 如图,在多面体
中,
为菱形,
,
平面
,
平面
,
为
的中点,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/13/d568fb6b-de03-449b-b246-ff70d07a2ae4.png?resizew=154)
(1)求证:
平面
;
(2)若
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f09ad78d4eccd1a9c9ccd3c4af79c79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147e7c8ba0bbb540a712f6eb2ed6d22e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/13/d568fb6b-de03-449b-b246-ff70d07a2ae4.png?resizew=154)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1d0df73a49d4348a5c1e3aaa149cc8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20af148464904e21f4374cc8fb886fba.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14833dbeed409b33acd4c9071fd0be36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19fa7ff056747ebdc342dc2ddf1b4b16.png)
您最近一年使用:0次
8 . 如图,已知四棱锥的侧棱PD⊥底面ABCD,且底面ABCD是直角梯形,AD⊥CD,AB∥CD,AB=AD=
CD=2,点M在侧棱上.
![](https://img.xkw.com/dksih/QBM/2016/7/15/1572920864497664/1572920870592512/STEM/c62049c0365a4901a0aa5151f596cfd8.png)
(1)求证:BC⊥平面BDP;
(2)若侧棱PC与底面ABCD所成角的正切值为
,点M为侧棱PC的中点,求异面直线BM与PA所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/2016/7/15/1572920864497664/1572920870592512/STEM/c62049c0365a4901a0aa5151f596cfd8.png)
(1)求证:BC⊥平面BDP;
(2)若侧棱PC与底面ABCD所成角的正切值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
您最近一年使用:0次
2016-12-04更新
|
588次组卷
|
4卷引用:2015-2016学年河北省冀州中学高二下期中理科数学A卷
9 . 如图所示,平面
平面
,
是等边三角形,
是矩形,
是
的中点,
是
的中点,
与平面
成
角.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/10/16103ec6-13eb-4476-b339-1740143b76cf.png?resizew=247)
(1)求证:
平面
;
(2)若
,求二面角
的大小;
(3)当
的长是多少时,点
到平面
的距离为2,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3abb27f8d654064a92f9d7a11e586ab5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f460edcced5597615113c0fdc95b1dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/10/16103ec6-13eb-4476-b339-1740143b76cf.png?resizew=247)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1d0df73a49d4348a5c1e3aaa149cc8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b0b10e8c3309c0a6f1e3bb7656afd45.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a681d311a864d38cf306a0c137cbcca.png)
您最近一年使用:0次
13-14高二上·山东济宁·期末
名校
10 . 在直角梯形
中,
,
,
,
为
的中点,如图,将
沿
折到
的位置,使
,点
在
上,且
,如图.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/10/15f508ca-0968-4bbd-9de4-bad770d6b029.png?resizew=377)
(1)求证:
平面
;
(2)求二面角
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4864c21e9664fa9111ede6425b09563a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3961549a99ec36a3dfbe914528e2503b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ad8d16722f5b9e7fd2602f14d5ffbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58fc6a5e71fa379d613ac1ef1cdf1048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72e49817548cb45b3d1e58570644c6fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8390b8e153b2338b6485552996aea6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/defa5b53043ae802bb1af7d14374406d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce9abbc1e0bc9c89ae1ee959117659e5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/10/15f508ca-0968-4bbd-9de4-bad770d6b029.png?resizew=377)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c83f8945042b9c8fb2fbdac9308d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f4096ff62b4f29932cd8c6eef661a3.png)
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2016-12-04更新
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9卷引用:河北省衡水中学2022届高三上学期高考模拟卷(三)数学试题
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