2023高三·全国·专题练习
解题方法
1 . 在正方体
中,如图
、
分别是
,
的中点.求证:平面
平面
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.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/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e02a30250ad392cd0cb551293766e834.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://img.xkw.com/dksih/QBM/2023/11/14/3367848563793920/3369282330198016/STEM/5e00a1e8fa6c4a1db8b70eb17dcd314c.png?resizew=153)
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2023高三·全国·专题练习
2 . 如图,直三棱柱
中,
,
,
,D为BC的中点,E为
上的点,且
.求证:
平面
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8e9ec412ea0355e4e5cd06c60e5fee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5512e952889260d73f25e06078135fdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9359d496bff564e6d8619dc77c878366.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c654230745ee598148d531cc98926ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b2213b575a7cfaffcdf91885005c7d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/d79e166b-795e-41ff-9520-f645de1d3899.png?resizew=143)
您最近一年使用:0次
2023高三·全国·专题练习
解题方法
3 . 如图,在四棱锥
中,
平面
,
,
,
,
.
为
的中点,点
在
上,且
.
求证:平面
平面
.
![](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/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a923784f083b7f4777891afe06b44e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](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/e253397d209d74dd1c1f2a38f52738ab.png)
求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6501f1c913a4ef64957a2f01ab5baa15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://img.xkw.com/dksih/QBM/2023/11/14/3367848563793920/3369282330615808/STEM/2dc6e317807c4fa0b10edd16529cc7b3.png?resizew=144)
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2023高三·全国·专题练习
解题方法
4 . 斜三棱柱
的各棱长都为
,点
在下底面
的投影为
的中点
.在棱
(含端点)上是否存在一点
使
?若存在,求出
的长;若不存在,请说明理由;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27a878ed00f28b1e57cbe88f5f352ecd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43c53cee325b734f115aef70efdae3dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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2023高三·全国·专题练习
解题方法
5 . 如图,棱台
中,
,底面ABCD是边长为4的正方形,底面
是边长为2的正方形,连接
,BD,
.证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7929b25566f051e25a63ad341470523a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d609847e2ff3d64e5a514582c3ead0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c92b5799d12ea37de46d7c942ce7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/288abe01824f42cfe725509af5aec4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/555dfe77eeb168a880694e22bd9acbdd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/67133f08-9004-4f64-aec4-71ac4514f822.png?resizew=158)
您最近一年使用:0次
2023高三·全国·专题练习
解题方法
6 . 如图,在三棱柱
中,
平面ABC,
,
,D为
的中点,
交
于点E.证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ba846c4dec057a9eec4174306efd06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8bfe2553e852df73185d017c0a62fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb5abdd2a03d00be92c60c7a30b7fca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd4c85bb98a2a0afddd7ed92578ad2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a73616ee0a39a5c84c6635b3840880b5.png)
![](https://img.xkw.com/dksih/QBM/2023/11/14/3367848286707712/3369243857821696/STEM/79c1d29d7548405090a8e27433735c41.png?resizew=147)
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2023高三·全国·专题练习
7 . 如图四棱锥
,且
,平面
平面
,且
是以
为直角的等腰直角三角形,其中
为棱
的中点,点
在棱
上,且
.求证:
四点共面.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66d8f4270ac3c1844288bb5cb82e81ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/694e6bc99d14c7d9105928d3a0ccf0c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36aae82d53f2a35d2f95f467bd5b76cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34f4ea9203ad9cd37c444cf1867c8746.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c3c11de81d6b7d9cb6b34f67aba11fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96b3d919fe28e81cc33c049bd4956647.png)
![](https://img.xkw.com/dksih/QBM/2023/11/14/3367848286707712/3369243855331328/STEM/8132d4941e6a4f5aaef3629c23250e31.png?resizew=140)
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名校
8 . 如图:在平行六面体
中,
为
的交点.若
,则向量
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/04533063-1ff7-45ea-8da1-266a4bf28809.png?resizew=192)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aad6afd51e8d1edcf96dc140caae9edc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a966a23c404f5edf329261ed749bb887.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98ce0da153621bbd05519f168b527e3e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/04533063-1ff7-45ea-8da1-266a4bf28809.png?resizew=192)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-11-16更新
|
361次组卷
|
3卷引用:6.1 空间向量及其运算(5)
9 . 如图
,在
中,
分别为
的中点,
为
的中点,
,
.将
沿
折起到
的位置,使得平面
平面
,如图
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/62276dd9-eaa0-4b09-bcba-ff3e6520bc0b.png?resizew=325)
(1)求证:
.
(2)线段
上是否存在点
,使得直线
和
所成角的余弦值为
?若存在,求出
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0117046e7a37bebe0c7b987a00d2bcb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa2a83fed9bf4cb09d84a980452e346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7b3e7c7845a0ec3cbac709fda131764.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c42bce098904b241986bb91c65ab33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/62276dd9-eaa0-4b09-bcba-ff3e6520bc0b.png?resizew=325)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e51c4114e94bceb198403c1858b9682.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a261474cc7607d31a6324cb4df9c8896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c741af321a8ddaf387fa661f3920ad84.png)
您最近一年使用:0次
2023-11-16更新
|
399次组卷
|
3卷引用:6.3 空间向量的应用 (3)
10 . 已知空间三点
、
、
,则以
、
为邻边的平行四边形的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b9c668b4f8cfaeab82fe4beb5ed1a66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ebdcfc1a82f1e38a1f9cecf7a969023.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4886655e4272d2a5eb40adf508e4aa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-11-15更新
|
235次组卷
|
3卷引用:6.2 空间向量的坐标表示(2)