名校
解题方法
1 . 已知在四棱锥P-ABCD中,底面ABCD是矩形,且
,
,
平面ABCD,E,F分别是线段AB、BC的中点.
![](https://img.xkw.com/dksih/QBM/2020/3/5/2412920483577856/2416619864596480/STEM/f9000bc5628943a28ab25901f82b4bc1.png?resizew=201)
(1)证明:
;
(2)点G在线段PA上,且
平面PFD,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://img.xkw.com/dksih/QBM/2020/3/5/2412920483577856/2416619864596480/STEM/f9000bc5628943a28ab25901f82b4bc1.png?resizew=201)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fb2fbbce7207d2b2bdd5c5ab61ecd04.png)
(2)点G在线段PA上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1399e7ae0b2decaafc62a5cdffb15522.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52827b0748edee7b8a1576ed3c824684.png)
您最近一年使用:0次
名校
解题方法
2 . 如图,四棱锥
中,平面
平面
,底面
为梯形,
,
,
.且
与
均为正三角形,
为
的中点,
为
重心.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/c31a9809-e239-40f1-92b7-64a2583977ca.png?resizew=175)
(1)求证:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8cfaf72b97aa690ff41c84f9ed29a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d0d5f57a40474205aee752e23ec449d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/c31a9809-e239-40f1-92b7-64a2583977ca.png?resizew=175)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf60ad9db3411f35704fa88d86bfef5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c440fdd6a9db8fcbf6584dd03d0140a6.png)
您最近一年使用:0次
2020-05-31更新
|
267次组卷
|
2卷引用:江西省南昌市进贤县第一中学2019-2020学年高二下学期开学考试数学(文)试题
解题方法
3 . 在正方体ABCD﹣A1B1C1D1中,E是BC1的中点,求证:DE∥平面AB1D1.
您最近一年使用:0次
解题方法
4 . 在正方体
,对角线
交
于K,对角线
交平面
于O.在正方形
内,以
为直径的半圆弧上任意取一点M.求证:
![](https://img.xkw.com/dksih/QBM/2021/5/23/2727119133310976/2759979003756544/STEM/67b6eb30-e60e-412c-92c5-ff0966ae458c.png?resizew=194)
(1)
平面
;
(2)平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf9628142422a4884bd59538da6d312.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b54387f870ae37f7951b253665d64f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2021/5/23/2727119133310976/2759979003756544/STEM/67b6eb30-e60e-412c-92c5-ff0966ae458c.png?resizew=194)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc1e8b84997b1111a39b60141af92c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fae7f4612c548b1f72a964ddb291cd2e.png)
(2)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb23a04ac9df27fb987126e7ba0f6c6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17c5ef850e256c98ca4f033999e61311.png)
您最近一年使用:0次
2019高一上·全国·专题练习
5 . 如图,空间几何体ABCDFE中,四边形ABCD是菱形,直角梯形ADFE所在平面与平面ABCD垂直,且AE⊥AD,EF∥AD,其中P,Q分别为棱BE,DF的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/fa3eaf32-911d-4589-9caa-b182854dbe79.png?resizew=195)
求证:PQ∥平面ABCD.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/fa3eaf32-911d-4589-9caa-b182854dbe79.png?resizew=195)
求证:PQ∥平面ABCD.
您最近一年使用:0次
解题方法
6 . 如图,四边形
是边长为1的正方形,
平面
,
平面
,
.
![](https://img.xkw.com/dksih/QBM/2020/12/29/2624681803489280/2628295185555456/STEM/077deb1e7b2c4bfb8b748b0cef15a898.png?resizew=160)
(1)求证:
平面
;
(2)求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb92a5e7dc942c44d0f6d7f3906ff804.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c611de332ba0c529d633a6cfe5240d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5254a8bb97154dc16c9435ef00ff5818.png)
![](https://img.xkw.com/dksih/QBM/2020/12/29/2624681803489280/2628295185555456/STEM/077deb1e7b2c4bfb8b748b0cef15a898.png?resizew=160)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d11e0a64470aac58556c3c99c18be5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ddb7c2ca1b6bee86cb24fed02e40da2.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1885efcff0b903e314057dd153578600.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59ac7cf883a6e586d06e3f33875bd95b.png)
您最近一年使用:0次
7 . 如图,在四棱柱
中,点M和N分别为
和
的中点.求证:
平面ABCD.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e3334853138fb74687d66b1e45f2fd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/e8ec38a5-8440-437e-af11-d94127be7cd0.png?resizew=178)
您最近一年使用:0次
20-21高一·全国·课后作业
解题方法
8 . 如图,在三棱锥S-ABC中,D,E,F分别是AC,BC,SC的中点,G是AB上任意一点.求证:SG∥平面DEF.
您最近一年使用:0次
2019高三·全国·专题练习
名校
9 . 如图所示,
是圆
的直径,
是圆
上两点,
,
圆
所在的平面,
,点
在线段
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/624f0fee-475f-43c6-98a3-877df1a5d0ba.png?resizew=155)
(1)求证:
平面
;
(2)求异面直线
与
所成角的余弦值.
![](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/fbdb21011ea821b91d539cb763aac649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3218270ac0c8dd872b74e4c597f73044.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd3eb538f36e6e722e4ce125266b99b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c35381ac508d73867e303980a05db370.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/624f0fee-475f-43c6-98a3-877df1a5d0ba.png?resizew=155)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e589e2dff283a5fed007500bc834272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
解题方法
10 . 如图,四边形
与
均为边长为1的菱形,
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/7d15279b-e03e-4203-9f8c-74474130a362.png?resizew=222)
(1)求证:
平面
;
(2)求点A到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f84f169e50dc59d4f7a8e1e36f5c847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a8083bd859ca71ed9d103672eacff93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6b27bd5f1437c638082a7eec033b4c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/7d15279b-e03e-4203-9f8c-74474130a362.png?resizew=222)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8616b1ede7bc2ce435323485a6180067.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2194add18a7df1a23cf1554dc2da1b40.png)
(2)求点A到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f84f169e50dc59d4f7a8e1e36f5c847.png)
您最近一年使用:0次