已知正方形
的边长为2,
为等边三角形(如图1所示).沿着
折起,点
折起到点
的位置,使得侧面
底面
.
是棱
的中点(如图2所示).
(1)求证:
;
(2)求点
与平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef328d61bcf3cece520c35a2ce449ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee6765a83140d745a6de4c85d9b6b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/8/c4e761e3-e1ef-41fe-a956-695d6e0d6309.png?resizew=336)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/789c9c79846abc6ba99cf3e575cdae6f.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a03203dd5ac79dd8c6707e4340773359.png)
23-24高三上·四川成都·阶段练习 查看更多[4]
四川省成都市教科院附中2023-2024学年高三上学期10月月考数学(文)试题(已下线)考点9 垂直的判定与性质 2024届高考数学考点总动员【练】江西省宜春市上高二中2023-2024学年高二上学期第三次月考数学试题江西省新余市实验中学2023-2024学年高二上学期12月月考试数学试题
更新时间:2023-10-19 08:16:50
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相似题推荐
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,在直三棱柱
中,
,点M为
的中点,点N为
上一动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/0f9e8ed0-0a53-4e8f-8ef2-c82120090898.png?resizew=190)
(1)是否存在点N,使得线段
平面
?若存在,指出点N的位置,若不存在,请说明理由;
(2)若点N为
的中点,且
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/528cf687f3727fa0f827a3d90c9041cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/0f9e8ed0-0a53-4e8f-8ef2-c82120090898.png?resizew=190)
(1)是否存在点N,使得线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
(2)若点N为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84bd173466089f8e523dc02808239daf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9f41038b29426e9e592cd50c1b71e7e.png)
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解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】如图,四棱锥
中
,
,
,
平面CDP,E为PC中点.
![](https://img.xkw.com/dksih/QBM/2022/4/25/2965894619717632/2969148206342144/STEM/1df68587-487a-4b6e-baa2-ad6846b4e2c9.png?resizew=205)
(1)证明:
平面PAD;
(2)若
平面PAD,
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27db558e8db4c957654c8e5cecd2d2dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://img.xkw.com/dksih/QBM/2022/4/25/2965894619717632/2969148206342144/STEM/1df68587-487a-4b6e-baa2-ad6846b4e2c9.png?resizew=205)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/691ac0c5413e8a212af014f211558c13.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e245440d3761fb4217eaa8dc303fa288.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3270a465cbf0ad38535e968c9135663.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09b672ffa6271d658873780ba1ae5e21.png)
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解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】如图,已知
矩形ABCD所在平面,BD与AC相交于O点,M,N分别是AB,PC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/26/2c4b43ec-9728-4400-943d-396e14ffe2a3.png?resizew=185)
(1)求证:
平面PAD;
(2)若
,求证:
平面PCD.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/26/2c4b43ec-9728-4400-943d-396e14ffe2a3.png?resizew=185)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53fa5dcaf5a25118ccb7af76d5fff2b8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0498b9374bee2169d323c3bd8d2d23d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93cf663ee2bf1ac5c43f4306fa0cf250.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
解题方法
【推荐2】如图所示,在直四棱柱
中,
,点
是棱
上一点
(1)求证:
平面
;
(2)求证:
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22bebf68c92f3fc0de750330b001df56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/498c3a1b2dea65bd13d3906597b36a28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a7711afeb265550ead8321ea2a24d5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/16/aa333997-f5ee-494b-9870-fac0b0b39cc4.png?resizew=157)
您最近一年使用:0次
解答题-证明题
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适中
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名校
【推荐3】如图,四棱锥
中,
,且
,
,
,
是
的中点,平面
平面
.
平面
;
(2)若直线
与平面
所成的角为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/625bca170fed3fbdc1441b3c0df4a6bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62974d34de3a12418d6b700420afd1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a44cd09d9ad46264de4620c60370d49d.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1069d514c3c32aeabd274475ee209ed6.png)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
解题方法
【推荐1】如图,在直四棱柱
中,
平面
,四边形
为菱形,
,
,
,
为棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/90da6235-cf00-4af8-b1b7-ddf8ede562d0.png?resizew=220)
(1)求证:
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.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/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/90da6235-cf00-4af8-b1b7-ddf8ede562d0.png?resizew=220)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923d409630f5331cf8e85fb6c584e31b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
解题方法
【推荐2】如图所示,在矩形ABCD中,
,将
沿AE折起至
的位置,使得
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/4004b69a-ef30-422d-b5c7-e7f745660a0e.png?resizew=354)
(1)求证:
;
(2)若
,求点C到平面PAE的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a838d50665205e7549a53fd753582c9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63b43490ca09467a4c8cd8cfe91c94e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbe40405cd7bd60d69dd535d6da85c00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83640592853a53872d7af69c0cffc1bb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/4004b69a-ef30-422d-b5c7-e7f745660a0e.png?resizew=354)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/985905ab3559ed7ec54e745a493629af.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b59ab6bf6111dda4a3d428454768b77.png)
您最近一年使用:0次