解题方法
1 . 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
名校
解题方法
2 . 如图,
,
均为
的直径,
所在的平面,
.求证:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/79380500-e969-478b-a437-008ffc019daa.jpg?resizew=153)
(1)
;
(2)直线
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee349dce93eb54eaa0a98e29609e6ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac192cfba38bf0e2df0c2d490596aa65.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/22/79380500-e969-478b-a437-008ffc019daa.jpg?resizew=153)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f2bd3555b7a604e1d3c460bfa068adb.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f44f2b2f82a9126223138972850aa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
您最近一年使用:0次
2021-08-09更新
|
402次组卷
|
2卷引用:江西省赣州市兴国平川中学2022-2023学年高二下学期期中数学试题
名校
3 . 如图,在几何体
中,平面
平面
,四边形
为菱形,
,
,
,M为
中点.
![](https://img.xkw.com/dksih/QBM/2020/10/9/2567400978063360/2574473828024321/STEM/bc20c422a8044863ad9c4e5393c131e3.png?resizew=202)
(1)求证:
平面
;
(2)求平面
与平面
所成二面角(不大于90°)的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.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/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90101de7db431b9632452fb694622379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e41d3f7d55fcbaebc4e2450ac63a3dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2020/10/9/2567400978063360/2574473828024321/STEM/bc20c422a8044863ad9c4e5393c131e3.png?resizew=202)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39284c1ef4a749b8683a7c79c4246672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
您最近一年使用:0次
名校
4 . 如图,在正方体
中,点E、F分别为是
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/4a9a441d-14a3-4f39-b032-8ec4de72761d.png?resizew=162)
(1)证明:
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64265fe16d0d3eadd213f2d6529e07fa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/4a9a441d-14a3-4f39-b032-8ec4de72761d.png?resizew=162)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b7903de4be7d5dc1175cfbf6e8da9f.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/349740b9aa8c242258eb07cb7224c3f6.png)
您最近一年使用:0次
解题方法
5 . 如图,六面体ABCDEFGH中,平面
平面EFGH,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/14/4ee8bf85-f4cf-4990-b03d-27574ac7f1d8.png?resizew=171)
(1)若
,平面
平面EFGH,二面角F-AE-H的大小为120°,
,
,求三棱锥
的体积;
(2)若A,E,G,C四点共面,求证:直线FB与HD相交.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04de6e3d84ddf7da3dc4fab26e59df46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9366db1b71034abbe1a5693689cf1c22.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/14/4ee8bf85-f4cf-4990-b03d-27574ac7f1d8.png?resizew=171)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bce726bceb02452bb4e5ed6b00fa94e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a5628323a7eeb11213df5c9048b3543.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/940078c89bad1724a5d7006a54755398.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8431e94821612587f5bda0e4b7b4e4a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05faba2914ca571cce6d6634e880ebeb.png)
(2)若A,E,G,C四点共面,求证:直线FB与HD相交.
您最近一年使用:0次
2020-11-27更新
|
212次组卷
|
2卷引用:四川省蓉城名校联盟2020-2021学年高二第一学期期中联考理科数学试题
6 . 已知正三棱柱
的底面边长为2,点
,
分别为棱
与
的中点.
![](https://img.xkw.com/dksih/QBM/2020/11/21/2597571746922496/2598598526959616/STEM/ce1bbf8a74c64dc38664ee98b376c534.png?resizew=265)
(1)求证:直线
平面
;
(2)若该正三棱柱的体积为
,求直线
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.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/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://img.xkw.com/dksih/QBM/2020/11/21/2597571746922496/2598598526959616/STEM/ce1bbf8a74c64dc38664ee98b376c534.png?resizew=265)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
(2)若该正三棱柱的体积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b10e8abf8690e4b129466ddb918bcc94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2020-11-22更新
|
558次组卷
|
2卷引用:山东省潍坊市2020-2021学年高三上学期期中考试数学试题
解题方法
7 . 如图,已知四棱锥
的底面是平行四边形,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/8e9531ac-b46c-4ad9-b360-2e1ceaffd963.png?resizew=160)
(1)求证:
平面
;
(2)若点
分别是棱
,
的中点,求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3c3703cc0971a5c65eb388d6ee64862.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/8e9531ac-b46c-4ad9-b360-2e1ceaffd963.png?resizew=160)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
您最近一年使用:0次
2020-04-06更新
|
863次组卷
|
4卷引用:江苏省南京市2019-2020学年高二上学期期中数学试题
江苏省南京市2019-2020学年高二上学期期中数学试题江苏省徐州市铜山区大许中学2020-2021学年高二上学期调研测试数学试题安徽省合肥市双凤高级中学2022届高三二模文科数学试题(已下线)第03讲 空间直线、平面的平行 (高频考点—精讲)-2
名校
解题方法
8 . 如图,在四棱锥O﹣ABCD中,OA⊥底面ABCD,且底面ABCD是边长为2的正方形,且OA=2,M,N分别为OA,BC的中点.
(1)求证:直线MN
平面OCD;
(2)求点B到平面DMN的距离.
(1)求证:直线MN
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
(2)求点B到平面DMN的距离.
![](https://img.xkw.com/dksih/QBM/2019/12/28/2372103952433152/2419518485512192/STEM/5167e8e76a084772b5eb00faef5a5804.png?resizew=180)
您最近一年使用:0次
2020-03-14更新
|
1782次组卷
|
5卷引用:江西省南昌市新建县第一中学2019-2020学年高二下学期线上期中考试数学(文)试题
名校
解题方法
9 . 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