解题方法
1 . 如图,在四棱柱
中,侧棱
底面
,四边形
为菱形,
,E,F分别为
的中点.
平面
,并求点C到平面
的距离;
(2)证明:
四点共面.
![](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/1e77db8e97cf0910fec52f526d0e4b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e86e3991200297ad172455e5ea93f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc78a86b12ba0b4553135a3a635fc418.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc78a86b12ba0b4553135a3a635fc418.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9da066c1fd31a8271a7c2c73d089a27d.png)
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名校
解题方法
2 . 图1是由矩形
,
和菱形
组成的一个平面图形,其中
,
,
,将该图形沿AB,AD折起使得AE与AF重合,连接CG,如图2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/6/c1fbddb9-5ab4-404c-928d-b7a5747cfeff.png?resizew=342)
(1)证明:图2中的C,D,E,G四点共面;
(2)求图2中三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ddcd5435b39971f897210aa0b66a259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e7ba6e267dde1a65a98f9f36b585ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6eaeff3c3502abbcf1626bac6a9de96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/6/c1fbddb9-5ab4-404c-928d-b7a5747cfeff.png?resizew=342)
(1)证明:图2中的C,D,E,G四点共面;
(2)求图2中三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/629816103334bd61b4e623a74ad35054.png)
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名校
解题方法
3 . 如图,在长方体
中,
,
,点
,
分别为棱
,
的中点.
![](https://img.xkw.com/dksih/QBM/2022/4/26/2966410405871616/2997572027432960/STEM/2da8adb9-23e7-4d01-9f13-fa4dc8ee2729.png?resizew=216)
(1)证明:
,
,
,
四点共面;
(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/5e3b3d73ff96882a0fb4d025ecc5669d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dfd2625e4d67a4b10face96537721a5.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/2022/4/26/2966410405871616/2997572027432960/STEM/2da8adb9-23e7-4d01-9f13-fa4dc8ee2729.png?resizew=216)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/6795cae2df43a722e1355e9562d93c09.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef676509065322bfc244e59607bb60d.png)
您最近一年使用:0次
2022-06-09更新
|
304次组卷
|
3卷引用:广西南宁市第三中学2021-2022学年高二下学期期末考试数学(文)试题
4 . 如图,在空间四边形
中,
分别是
的中点,
分别在
上,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab17d54a03f94f00d2861eeeb48328f.png)
四点共面;
(2)设
与
交于点
,求证:
三点共线.
![](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/374fe9986ebbc986fc422e514ab93a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c0f067a2a348ceb24a408f82992eab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5898ecbb5c528fa6cd5844d2133eb270.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab17d54a03f94f00d2861eeeb48328f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42c2d86d8daea5e652d99fe1c6bc3f9a.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59291aa62eb8c7f2103fc17f19c35259.png)
您最近一年使用:0次
5 . 如图,在空间四边形
中,
分别是
的中点,
分别是
上的点,满足
.
四点共面;
(2)设
与
交于点
,求证:
三点共线.
![](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/374fe9986ebbc986fc422e514ab93a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df4b833fb7dd03c34ac40c664cd8483d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcaf758acd401c991074c2e536f978f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e07fa020df938b03cd06e7953c714bfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42c2d86d8daea5e652d99fe1c6bc3f9a.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59291aa62eb8c7f2103fc17f19c35259.png)
您最近一年使用:0次
解题方法
6 . 如图,在四棱锥
中,底面
为正方形,
平面
,点
为
的中点.
![](https://img.xkw.com/dksih/QBM/2022/5/9/2975685806587904/2976923594784768/STEM/3c45e74261c04e87af88971320de0e8f.png?resizew=153)
(1)证明:点
不在平面
内;
(2)若
,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/2022/5/9/2975685806587904/2976923594784768/STEM/3c45e74261c04e87af88971320de0e8f.png?resizew=153)
(1)证明:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b72c6d2ae4924f930c437542b3356a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/001a1ffb477e4fde288a68618803b0e3.png)
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20-21高一·全国·课后作业
解题方法
7 . 如图,E,F,G,H分别是空间四边形ABCD的边AB,BC,CD,DA的中点,求证:
(2)
平面
,
平面
.
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/debdc6632a4877e5131d3da25cda8b89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f81fa367ec317fe2a30142e1c30cce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
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2021-11-13更新
|
565次组卷
|
4卷引用:内蒙古巴彦淖尔市临河区第三中学2021-2022学年高二(计算机班)上学期期末数学试题
内蒙古巴彦淖尔市临河区第三中学2021-2022学年高二(计算机班)上学期期末数学试题(已下线)13.2.3 直线与平面的位置关系(已下线)8.5 空间直线、平面的平行-2021-2022学年高一数学10分钟课前预习练(人教A版2019必修第二册)苏教版(2019)必修第二册课本习题 习题13.2(3)
名校
解题方法
8 . 如图,直棱柱
底面是菱形,点E,F分别在棱
,
上,且
,
.
![](https://img.xkw.com/dksih/QBM/2022/1/15/2895248465977344/2895695832678400/STEM/6169a163-46f4-4cf9-b9cc-e94a66db9d73.png?resizew=160)
(1)求证:
,
,
,
四点共面;
(2)若
,求平面
和平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec8c1ad9b9d81ca0ad6c60c97f8328a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad81239170146d8eca013cede8bddd7d.png)
![](https://img.xkw.com/dksih/QBM/2022/1/15/2895248465977344/2895695832678400/STEM/6169a163-46f4-4cf9-b9cc-e94a66db9d73.png?resizew=160)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffa102f519d541f2e4d10a8975a41c36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589c878e789e07e33d65c8a18cf2c58a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
您最近一年使用:0次
2022-01-16更新
|
636次组卷
|
2卷引用:云南省昆明市第一中学2021-2022学年高二上学期期末考试数学试题
名校
解题方法
9 . 已知空间几何体ABCDE中,
,
是全等的正三角形,平面
平面BCD,平面
平面BCD.
(2)若
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b265d121f9ebc13671a5719604476a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa7fb4bb4caccf79639a126064771da5.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7206d0c258d2bbae8a667b2803d0804a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/306681bd5aaa51e9c63ab3002e23dec5.png)
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2022-03-04更新
|
496次组卷
|
3卷引用:新疆乌鲁木齐市第一中学2021-2022学年高一下学期期末考试数学试题
解题方法
10 . 如图,已知平面
平面
,点O在线段
上,
,
都是等边三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/e43f7f13-6741-434c-bf0d-45ddd754f0af.png?resizew=187)
(1)证明:B,C,E,F四点共面;
(2)求平面
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f5675820cc66f1849a495535be57201.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c90207f59eff81d32319b1de7955ba.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/e43f7f13-6741-434c-bf0d-45ddd754f0af.png?resizew=187)
(1)证明:B,C,E,F四点共面;
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20af148464904e21f4374cc8fb886fba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
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2022-02-05更新
|
627次组卷
|
4卷引用:安徽省阜阳市2021-2022学年高三上学期期末教学质量统测理科数学试题