名校
1 . 已知正方体
的边长为4,点E是棱CD的中点,P为四边形
内(包括边界)的一动点,且满足
平面
,则点P的轨迹长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b724168afaee2ecddf97257180be18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231ecbf3b26a3ba1fdb7cbbd6ba90e87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e9d2681b05dcdaf1e3933356242b23d.png)
A.![]() | B.2 | C.![]() | D.1 |
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2023-09-06更新
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527次组卷
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5卷引用:河南省平顶山市叶县高级中学2023-2024学年高二上学期10月月考数学试题
河南省平顶山市叶县高级中学2023-2024学年高二上学期10月月考数学试题湖南省名校联盟2023-2024学年高二上学期入学摸底考试数学试题(已下线)专题02 空间动点轨迹8种题型归类-【巅峰课堂】2023-2024学年高二数学上学期期中期末复习讲练测(人教A版2019选择性必修第一册)(已下线)专题3.5空间直线、平面的平行-重难点突破及混淆易错规避(人教A版2019必修第二册)山东省济宁市第一中学2023-2024学年高一下学期6月月考数学试题
名校
解题方法
2 . 如图,在直三棱柱
中,
,
,D为
的中点,G为
的中点,E为
的中点,
,点P为线段
上的动点(不包括线段
的端点).
平面CFG,请确定点P的位置;
(2)求直线CP与平面CFG所成角的正弦值的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b29ef5a1361ddf48f47a1f8fdb6c08e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93ecad355286188fd317939fa50f9555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/737d5c0d51f16c43875e0a65557ac375.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c38413d086b38c176ed8c5b882d17641.png)
(2)求直线CP与平面CFG所成角的正弦值的最大值.
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2021-10-19更新
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1243次组卷
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8卷引用:河南省叶县高级中学2022-2023学年高二上学期9月月考数学试题
3 . 如图,在棱长为1正方体中,点P,Q分别是线段
,
上的动点,点E是棱
的中点,下列命题正确的有( )
A.异面直线![]() ![]() |
B.![]() ![]() |
C.三棱锥![]() |
D.过点E作平面![]() ![]() ![]() ![]() ![]() |
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2023-07-18更新
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497次组卷
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4卷引用:河南省平顶山市汝州市第二高级中学2022-2023学年高一下学期期末考试数学试题
河南省平顶山市汝州市第二高级中学2022-2023学年高一下学期期末考试数学试题河南省商丘市名校2022-2023学年高一下学期7月期末联考数学试题四川省内江市威远中学2023-2024学年高二上学期第一次月考数学试题(已下线)第二章 立体几何中的计算 专题六 空间定值问题 微点5 立体几何中的定形定值和定位定值问题【培优版】
4 . 如图,在四棱锥
中,
底面
,底面
是平行四边形,
,
,垂足为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/44940b3a-7a2f-484e-80ad-1d756d50fc72.png?resizew=169)
(1)证明:
平面
;
(2)若
,
,
是
中点,点
在
上,
平面
,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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4486d52b6e410fd7b60428121d96cef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/44940b3a-7a2f-484e-80ad-1d756d50fc72.png?resizew=169)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f607fc9bb9a1f6f810b2c9bd3af12e6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0f73b3c63084d9c032802e01f9a168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
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解题方法
5 . 如图,在三棱锥
中,
,
,且
,
为线段
的中点,
在线段
上.
![](https://img.xkw.com/dksih/QBM/2020/7/23/2512305697112064/2513573197987840/STEM/d6b656e1-e7ef-4e76-966e-991ea305aff8.png)
(Ⅰ)若
平面
,确定
点的位置并证明;
(Ⅱ)证明:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbb05b8b630052ff544249ebd72d95d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a15a004f7d47ed595f063e60075223a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/2020/7/23/2512305697112064/2513573197987840/STEM/d6b656e1-e7ef-4e76-966e-991ea305aff8.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c2b786c64e6a9ed2ec5670cde74f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(Ⅱ)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3547a914468b082d8d8741b974a03190.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
您最近一年使用:0次