解题方法
1 . 如图,在棱长均相等的平行六面体
中,用空间向量证明下列结论.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/05306c01-ff12-46a1-9020-d04c04d1978b.png?resizew=173)
(1)若
,求证:
平面
;
(2)若
是棱
的中点,
是
上靠近点
的三等分点,求证:
三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/05306c01-ff12-46a1-9020-d04c04d1978b.png?resizew=173)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9c4adb05045cdd808a1ff7d6662d79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d1d2e0f281222a5f289ea4008370aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/637bdc8cf5c522d2abab727ec3a11631.png)
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解题方法
2 . 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://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/4dd40306-533e-4088-89e5-4865b61ed853.png?resizew=154)
A.直线![]() ![]() |
B.直线![]() ![]() |
C.平面![]() ![]() |
D.点![]() ![]() ![]() |
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名校
解题方法
3 . 已知正方体
的棱长为2,若
的中点分别为
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00d061c7a9c98768ead226c27bdfd2f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
A.![]() |
B.![]() |
C.![]() ![]() |
D.点![]() ![]() ![]() |
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2023-11-15更新
|
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3卷引用:山西省运城市部分学校2023-2024学年高二上学期期中数学试题
名校
解题方法
4 . 如图,在斜四棱柱
中,底面
是边长为1的正方形,
,记
.
![](https://img.xkw.com/dksih/QBM/2023/10/10/3342973715734528/3344512309739520/STEM/07d74803f6384d7c97e7de6c3528746d.png?resizew=179)
(1)证明:
;
(2)求侧棱
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e42d2046a0e800a6bf082172027612e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dfb9769a14ebf5cbc5fa0c06ce96435.png)
![](https://img.xkw.com/dksih/QBM/2023/10/10/3342973715734528/3344512309739520/STEM/07d74803f6384d7c97e7de6c3528746d.png?resizew=179)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aa142bb96af98b846997e681609739f.png)
(2)求侧棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
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5卷引用:山西省运城市稷山县稷山中学2023-2024学年高二上学期11月月考数学试题
解题方法
5 . 正方体
的棱长为
分别为线段
和
中点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89952953873ddf693370dedd910d86be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b25f3ea33cc08b1e2a0d9c3a9dccaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
A.![]() ![]() |
B.直线![]() ![]() |
C.点![]() ![]() ![]() |
D.直线![]() ![]() |
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名校
解题方法
6 . 已知正方体
棱长为
为棱
中点,
为正方形
上的动点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa67c54003b5768ee0ef107c6becbdfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
A.满足![]() ![]() ![]() |
B.满足![]() ![]() ![]() ![]() |
C.存在点![]() ![]() ![]() |
D.存在点![]() ![]() |
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3卷引用:山西省运城市教育发展联盟2023-2024学年高二上学期10月调研测试数学试题
解题方法
7 . 如图,在平行六面体
中,以顶点
为端点的三条棱长均为6,且它们彼此的夹角都是
,下列说法中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/27/04f8f9e9-693b-481e-91f3-5a2e2123ef57.png?resizew=188)
A.![]() |
B.直线![]() ![]() ![]() |
C.向量![]() ![]() ![]() |
D.![]() ![]() |
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6卷引用:山西省运城市景胜中学2023-2024学年高二上学期10月月考数学试题(A卷)
山西省运城市景胜中学2023-2024学年高二上学期10月月考数学试题(A卷)江苏省徐州市铜山区2022-2023学年高二下学期期中数学试题第一章 空间向量与立体几何 (练基础)(已下线)专题1.8 空间向量与立体几何全章综合测试卷(基础篇)-2023-2024学年高二数学举一反三系列(人教A版2019选择性必修第一册)浙江省绍兴蕺山外国语学校2023-2024学年高二上学期9月检测数学试题黑龙江省鸡西市虎林高级中学2023-2024学年高二上学期第一次月考数学试题
名校
解题方法
8 . 已知直三棱柱
中,
是
的中点,
为
的中点.点
是
上的动点,则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/31a94d6d-66be-4717-bf2a-889a9f2c967d.png?resizew=164)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7c3a03829860d2bdaf84119a91cb7be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/31a94d6d-66be-4717-bf2a-889a9f2c967d.png?resizew=164)
A.无论点![]() ![]() ![]() |
B.当直线![]() ![]() ![]() ![]() |
C.若三棱柱![]() ![]() |
D.![]() ![]() |
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