2019高二上·全国·专题练习
1 . 如图,正方体
中,
分别是棱
的中点,求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b199a99e53d67ff4abf233930961a29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1cb657b991b5cd47258a68cbd1832c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab72f7d2b30a1cd2e86ea450e2e75356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/807e880a-fda6-41b6-9ec8-1ccb4a7280b7.png?resizew=153)
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2 . 在底面是正三角形、侧棱垂直于底面的三棱柱ABC﹣A1B1C1中,底面边长为a,侧棱长为2a,点M是A1B1的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/a63939cd-536d-4b41-95d4-5f910155c30c.png?resizew=111)
(1)证明:MC1⊥AB1.
(2)求直线AC1与侧面BB1C1C所成角的正弦值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/a63939cd-536d-4b41-95d4-5f910155c30c.png?resizew=111)
(1)证明:MC1⊥AB1.
(2)求直线AC1与侧面BB1C1C所成角的正弦值.
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3 . 直四棱柱
中,
,
,E、F分别为棱AB、
上的点,
,
.求证:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/feae3ba7-d07d-431c-bcef-340610606e40.png?resizew=184)
(1)
平面
;
(2)线段AC上是否存在一点G,使面
面
.若存在,求出AG的长;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02c25b95e61557eec096de150ab873f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8645ef3bdf9c1b30136465a486af546c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/feae3ba7-d07d-431c-bcef-340610606e40.png?resizew=184)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
(2)线段AC上是否存在一点G,使面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5394d00a80a5900d7fd7d9961868bd22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
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解题方法
4 . 如图,在直三棱柱
的面
中
,棱
分别是
的中点.
![](https://img.xkw.com/dksih/QBM/2020/3/17/2421383968727040/2422388324524032/STEM/42a64d1053c941c9801f1a13c4b3b922.png?resizew=132)
(1)求向量
的模;
(2)点P是线段
上一点,且
,求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b591658d73b4e76b3c4c0d4628ec65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd8107de07e4bc862b011f4f1546a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec13cea4be794931ffff1e24960ee8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa046b8ba390e28c3b2621fb25fa6b9.png)
![](https://img.xkw.com/dksih/QBM/2020/3/17/2421383968727040/2422388324524032/STEM/42a64d1053c941c9801f1a13c4b3b922.png?resizew=132)
(1)求向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbdcf27706470c29844546103a538021.png)
(2)点P是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e17230625e72d3a9c6d72ff61019ff61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a35921c5e239d7b137caf61c756234ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f25bf973e789256889a2a19f9f18782.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c209426ae739bbe2efd9c9394c6cd3d0.png)
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2020-03-18更新
|
236次组卷
|
2卷引用:陕西省西安中学2017-2018学年高二(平行班)上学期期中数学(理)试题
名校
解题方法
5 . 在平面四边形
中,
、
分
、
所成的比为
,即
,则有:
.
![](https://img.xkw.com/dksih/QBM/2020/3/5/2413171253133312/2413528477220864/STEM/b4b26cb559bc4f43a2db9a0ee584907e.png?resizew=172)
(1)拓展到空间,写出空间四边形
类似的命题,并加以证明;
(2)在长方体
中,
,
,
,
、
分别为
、
的中点,利用上述(1)的结论求线段
的长度;
(3)在所有棱长均为
平行六面体
中,
(
为锐角定值),
、
分
、
所成的比为
,求
的长度.(用
,
,
表示)
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9795e7f5cb9b366776c41d8f3f43942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fdc83becc28e0f43d71427d9e8775d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/370e89e963f026cb0248f4f50e74db0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d88727d06d24b1f8dc38e0bed7f84381.png)
![](https://img.xkw.com/dksih/QBM/2020/3/5/2413171253133312/2413528477220864/STEM/6ee9650d01614f699a380843cbfc48f3.png?resizew=148)
![](https://img.xkw.com/dksih/QBM/2020/3/5/2413171253133312/2413528477220864/STEM/ff548b6517ff473aa7c0fe1dae2732cb.png?resizew=183)
![](https://img.xkw.com/dksih/QBM/2020/3/5/2413171253133312/2413528477220864/STEM/b4b26cb559bc4f43a2db9a0ee584907e.png?resizew=172)
(1)拓展到空间,写出空间四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)在长方体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d42e97eee705d164e6ac6de9ecd6d1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a88b719166fcc1431f876bc8c5656c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab743f2864f34e28ea6a849478a4b2e6.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(3)在所有棱长均为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3562306681ba2bfcbb8fb49af467d0f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.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/f426dc46de5b68c700ea3c431e095901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0417ee2508989ab8fcf9eba67d1ae646.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
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6 . 如图,在四棱锥中
中,
底面
,
,
,
,
,点
为棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/c7efde73-0bad-4b5e-ad45-4cbc051e438c.png?resizew=162)
(1)证明:
;
(2)若
为棱
上一点,满足
,求线段
的长.
![](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/4a0e5697eca3f5205cb7b343648240bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86c0ad79161fb29ec231dd0248623ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba814113887c21637c1954f244812f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/19/c7efde73-0bad-4b5e-ad45-4cbc051e438c.png?resizew=162)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a03d3b1a7b201f380f960db4b6ff2943.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f2a245381e615882ee5feb7793a1df6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
您最近一年使用:0次
2019-11-05更新
|
2079次组卷
|
9卷引用:上海市复旦大学附属中学2018-2019学年高二下学期期中数学试题
上海市复旦大学附属中学2018-2019学年高二下学期期中数学试题(已下线)2019年12月20日《每日一题》选修2-1理数-利用向量法求空间的距离人教B版(2019) 选择性必修第一册 过关斩将 第一章 空间向量与立体几何 本章达标检测(已下线)专练02 空间向量的数量积运算-2021-2022学年高二数学上册同步课后专练(人版A版选择性必修第一册)(已下线)第一章 空间向量与立体几何 单元检测(A卷)-2021-2022学年高二数学考点同步解读与训练(人教A版2019选择性必修第一册)人教A版(2019) 选修第一册 实战演练 第一章 课时练习 05 空间向量运算的坐标表示(已下线)第05讲 空间向量及其应用 (高频考点—精讲)-2(已下线)第01讲 空间向量及其运算(6大考点)-2022-2023学年高二数学考试满分全攻略(人教A版2019选择性必修第一册)山东省威海市乳山市银滩高级中学2023-2024学年高二上学期9月月考数学试题
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7 . 已知平行六面体
的底面是边长为1的菱形,且
,
.
(1)证明:
;
(2)求异面直线
与
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a3e9aea46f83b483c7ac996863c0c95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a8a0914a91a95faf8d82f175367f0e.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4319d3be7a478c1eab8501d1840bd6b1.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cabe764f05300ac83c7d16b685d27af4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/c1ea7c82-8d07-48a6-83c8-0bf34c3066cf.png?resizew=188)
您最近一年使用:0次
2020-02-27更新
|
1232次组卷
|
12卷引用:安徽省宿州市十三所省重点中学2019-2020学年高二上学期期末考试数学(理)试题
安徽省宿州市十三所省重点中学2019-2020学年高二上学期期末考试数学(理)试题(已下线)1.2 空间向量的基本定理(精讲)-2020-2021学年一隅三反系列之高二数学新教材选择性必修第一册(人教版A版)(已下线)第02讲 空间向量基本定理(教师版)-【帮课堂】天津市滨海新区塘沽第一中学2022-2023学年高二上学期第一次统练数学试题(已下线)1.2 空间向量基本定理(精讲)-2023-2024学年高二数学《一隅三反》系列(人教A版2019选择性必修第一册)山东省邹平市第一中学2023-2024学年高二上学期9月开学考试数学试题(已下线)第02讲 空间向量基本定理(5大考点8种解题方法)-2022-2023学年高二数学考试满分全攻略(人教A版2019选择性必修第一册)(已下线)高二上学期第一次月考十八大题型归纳(拔尖篇)(1)天津市第二十中学2023-2024学年高二上学期第一次统练数学试题(已下线)专题02空间向量基本定理(2个知识点3种题型)-【倍速学习法】2023-2024学年高二数学核心知识点与常见题型通关讲解练(人教A版2019选修第一册)(已下线)第01讲:空间向量(必刷9大考题+9大题型)-2023-2024学年高二数学上学期《考点·题型·难点》期末高效复习(人教A版2019选择性必修第一册)(已下线)专题08 空间向量基底法在立体几何问题中的应用4种常见考法归类 - 【考点通关】2023-2024学年高二数学高频考点与解题策略(人教A版2019选择性必修第一册)
名校
8 . 如图,在四棱锥
中,
底面
,
,
,
,
,点
为棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/f6cdd109-a158-46b9-a3ba-e10232cf2287.png?resizew=151)
(1)证明:
;
(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/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37591109b0a0ec5ffe2133f83310eca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba814113887c21637c1954f244812f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/f6cdd109-a158-46b9-a3ba-e10232cf2287.png?resizew=151)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b937442ad4cc480adc11bb143559454.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1112ffa328ed486ffc5e4a605eb510e.png)
您最近一年使用:0次
名校
9 . 如图,平面
平面
,四边形
与
都是直角梯形,
,
∥![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
,
∥
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/07ff399c-2e81-4eee-99aa-9b3ae41e3cd6.png?resizew=179)
(1)证明:四点
共面;
(2)设
.
①求
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/c674dc5024374f53920947c4cf4baf11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af49d81bca91dc5cc32753ec82e53cce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e839ac941e8bf536ff35a12e56c7a400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce8743d73f383f4e6baaae4fc07c5b00.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/07ff399c-2e81-4eee-99aa-9b3ae41e3cd6.png?resizew=179)
(1)证明:四点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50d6e29d79a1bd34722833d4c059644f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/738a7bc24f39d08ba3752418055e1d1b.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
②求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
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