解题方法
1 . 如图,在长方体
中,
分别是
的中点,求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc6e8da26cf6a4f1a0556619328c2d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23422ca23feb2d1d4a74deea58d1f8a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d28cedc01dbcdec9ef860a22b27575b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8e07ef268240e8d0fa08db765c25e25.png)
您最近一年使用:0次
2022高三·全国·专题练习
解题方法
2 . 如图,在直四棱柱
中,底面四边形
为梯形,点
为
上一点,且
,
,
,求证:
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ded2e3fdcab984f3699972fc3ff75d5.png)
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b86cde4e24036082b9c92253a6f579e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5d3aaafa4e988aee932be29cf5ac0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21c8f2410d6a17adcf6817b08d20f3ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ded2e3fdcab984f3699972fc3ff75d5.png)
![](https://img.xkw.com/dksih/QBM/2021/8/1/2776929630208000/2822105472999424/STEM/653db2c2af0d403b9f1e27ca822b057f.png?resizew=144)
您最近一年使用:0次
名校
解题方法
3 . 如图甲,设正方形
的边长为3,点
分别在
上,且满足
,
.将直角梯形
沿
折到
的位置,使得点
在平面
上的射影
恰好在
上,如图乙所示.
∥平面
;
(2)判断直线
与
的位置关系(不需要说明理由),并比较线段
与
长度的大小并加以证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c4cd264c97c1f261229925cc5a6761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02c25b95e61557eec096de150ab873f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87ef0a99a25b115e054452abff205544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/946c16d99496d31ce4d87301a4793393.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6ccd49a0c3ccd22943c15ed7bf0f4c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6480f384476190883f06c0289c7519.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/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbcfe92b25904211a9d1ebc69f07f196.png)
(2)判断直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554b3b4c5ce7aca81becc07ed4903736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554b3b4c5ce7aca81becc07ed4903736.png)
您最近一年使用:0次
解题方法
4 . 如图,三棱锥
中,
底面ABC,
,点E、F分别为PA、AB的中点,点D在PC上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/09be01f3-bfba-4b79-9204-5a99e8130d90.png?resizew=139)
(1)证明:
平面BDE;
(2)若
是边长为2的等边三角形,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829f9180ddd9aa1a0ee0dc520f4e0b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb12d96e3dea2951b5f76d5b88bccfb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/09be01f3-bfba-4b79-9204-5a99e8130d90.png?resizew=139)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94270844f197d524bf1da4f1385befd2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1112ffa328ed486ffc5e4a605eb510e.png)
您最近一年使用:0次
解题方法
5 . 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
6 . 如图,
是圆柱的母线,边长为4的正
是该圆柱的下底面的内接三角形,
,
,
分别为
,
,
的中点,
是
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/6f4f1c5f-a4f5-41c5-9d90-4de27f5f50ad.png?resizew=159)
(1)求证:
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602ee324ca5bc3cf9ef251a061b431ab.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/9/6f4f1c5f-a4f5-41c5-9d90-4de27f5f50ad.png?resizew=159)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b859ca54ab085edf70c1179a7d103a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2021-08-13更新
|
155次组卷
|
2卷引用:1号卷·A10联盟2022届全国高考第一轮总复习试卷数学(理科)试题(十五)
名校
解题方法
7 . 如图1,在直角梯形
中,
,
,
,
,
,点E在
上,且
,将三角形
沿线段
折起到
的位置,
(如图2).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/68af83f9-1da6-4919-8b67-77091f2006a0.png?resizew=302)
(1)求证:平面
平面
;
(2)在线段
上是否存在点M,使
平面
?若存在,求出
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd8e727e4efc22b49649f71ae9c9d84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/430b77d8d2a99713b192dc729ddc2275.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a19338598965bb3856cdd0236bbf694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6c2dad46a9052a4185a4f7b4ae8a2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b6869d7ca3325f7a279298c5334574f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/68af83f9-1da6-4919-8b67-77091f2006a0.png?resizew=302)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d96357a07048ba79b8c84097d359d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0684e0b09b04661c602437982c0397.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6c2dad46a9052a4185a4f7b4ae8a2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f59a8e73d86982a4882510a179b0efb0.png)
您最近一年使用:0次
2019高一上·全国·专题练习
8 . 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
名校
9 . 如图1,在等腰梯形ABCD中,
,
,
,E为AD的中点.现分别沿BE,EC将△ABE 和△ECD折起,使得平面ABE⊥平面BCE,平面ECD⊥平面BCE,连接AD,如图2.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/ad507a81-977b-4d9f-a97e-49c8cd9a6f4a.png?resizew=292)
(1)若在平面BCE内存在点G,使得GD∥平面ABE,请问点G的轨迹是什么图形?并说明理由.
(2)求平面AED与平面BCE所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccbff99696256fd402a2efb371862c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b35e692c54294045401f8add586eaaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/645d46c17903078e0b38279353c5430d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/ad507a81-977b-4d9f-a97e-49c8cd9a6f4a.png?resizew=292)
(1)若在平面BCE内存在点G,使得GD∥平面ABE,请问点G的轨迹是什么图形?并说明理由.
(2)求平面AED与平面BCE所成锐二面角的余弦值.
您最近一年使用:0次
2019-10-23更新
|
274次组卷
|
4卷引用:第三章 空间轨迹问题 专题五 微点2 翻折、旋转问题中的轨迹问题综合训练【培优版】
(已下线)第三章 空间轨迹问题 专题五 微点2 翻折、旋转问题中的轨迹问题综合训练【培优版】2020届河北省沧州市高三9月教学质量检测数学理试题河北省张家口市宣化区宣化第一中学2021届高三上学期9月月考数学试题2019年广东省湛江市高三上学期毕业班调研测试数学(理)试题
2019高三·全国·专题练习
名校
10 . 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