解题方法
1 . 如图,在五面体ABCDEF中,面
是正方形,
,
,
,且
.
![](https://img.xkw.com/dksih/QBM/2020/11/5/2586652106489856/2587378337193984/STEM/e04fac876bd647d5be63e867b2a2cb01.png?resizew=282)
(1)求证:
平面
;
(2)求直线BD与平面ADE所成角的正弦值;
(3)设M是CF的中点,棱
上是否存在点G,使得
平面ADE?若存在,求线段AG的长;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c1c122603b60b6f1a1334ddb56c3fb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b31e19fa5cf6d4d5f14f90e87d34ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85caed30a9d505b1e77577915bb2bd38.png)
![](https://img.xkw.com/dksih/QBM/2020/11/5/2586652106489856/2587378337193984/STEM/e04fac876bd647d5be63e867b2a2cb01.png?resizew=282)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
(2)求直线BD与平面ADE所成角的正弦值;
(3)设M是CF的中点,棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6287c16246f1c50ea26efc09040333ec.png)
您最近一年使用:0次
2020-11-06更新
|
1030次组卷
|
5卷引用:山东省青岛市青岛第九中学2022-2023学年高一下学期期末数学试题
山东省青岛市青岛第九中学2022-2023学年高一下学期期末数学试题北京市朝阳区2020届高三年级下学期二模数学试题(已下线)考点31 直线、平面垂直的判定及其性质-备战2021年高考数学(文)一轮复习考点一遍过(已下线)考点32 直线、平面垂直的判定及其性质-备战2021年高考数学(理)一轮复习考点一遍过(已下线)专题33 空间中线线角、线面角,二面角的求法-学会解题之高三数学万能解题模板【2022版】
名校
解题方法
2 . 如图为一简单组合体,其底面
为正方形,
平面
,
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/058095b0-2433-4399-942f-e50acc60d8cf.png?resizew=146)
(1)求四棱锥
的体积;
(2)求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b73f874048f9e48ae35ee95bbf443bce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a6e07a3ef8f3969afb82f91e6ae4ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/058095b0-2433-4399-942f-e50acc60d8cf.png?resizew=146)
(1)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/086d11e84f892311b5f4a5c306f859cc.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7175df06e33cad4e6bbc3f2f6b0a2986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/564376a88fa74090de9f7694226a6184.png)
您最近一年使用:0次
2020-03-20更新
|
1013次组卷
|
3卷引用:2020届黑龙江省海林市朝鲜族中学高三上学期期末数学(文)试题
名校
解题方法
3 . 如图,在三棱锥
中,
平面
,
,
.求证:
;
(2)若
,
分别在棱
,
上,且
,
,问在棱
上是否存在一点
,使得
平面
.若存在,则求出
的值;若不存在.请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c71dbf267939080668be464f1aa60da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0530f462e5ec1e58c46e1f7644d0cc21.png)
(2)若
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98de02d1d5b7ac04bce54be393218922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/760e8882e84ecd68bc889a55efce5d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d3f076d3f5a78fc081c252e9a55d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/261fbbc173664b0047448fef17763dfb.png)
您最近一年使用:0次
2021-08-07更新
|
615次组卷
|
6卷引用:山西省太原市2020-2021学年高一下学期期末数学试题
解题方法
4 . 已知长方体
,如图所示,其中
、
分别是线段
、
的中点.
(1)证明:
平面
;
(2)若
,直线
与
所成角的正切值为
,求四面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.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/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/20/cfcd19b4-410e-477b-8cb1-5bf3740014cf.png?resizew=173)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/635a764c14e95e53a7a160d84706a449.png)
您最近一年使用:0次
名校
解题方法
5 . 如图,四棱锥
的底面是矩形,平面
平面
,E,F分别是
的中点.
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899377870831616/2909306660012032/STEM/9b3edcb6-eb57-4209-9e6c-f40b98d2a52e.png?resizew=195)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
平面
:
(2)求点P到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e98b0b77d5910a7afe5da22c4586095d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7366da07065712da11602f4afce8cbed.png)
![](https://img.xkw.com/dksih/QBM/2022/1/21/2899377870831616/2909306660012032/STEM/9b3edcb6-eb57-4209-9e6c-f40b98d2a52e.png?resizew=195)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)求点P到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
您最近一年使用:0次
2022-02-04更新
|
429次组卷
|
2卷引用:安徽省部分学校2021-2022学年高三上学期期末联考文科数学试题
解题方法
6 . 已知在直四棱柱
中,底面
为直角梯形,且满足
,
,
,
,
,
,
分别是线段
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/2dfeec87-59f8-4592-bd3e-3c74107c6a5b.png?resizew=220)
(1)求证:平面
平面
;
(2)棱
上是否存在点
,使
平面
,若存在,确定点
的位置,若不存在,请说明理由.
![](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/9060f03b9ee41d70d135b1e1a8902ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/319536a5b0d3f94d4b1a495c3b19d79b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fd676c41d2d644928f014b0fea4689.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/2dfeec87-59f8-4592-bd3e-3c74107c6a5b.png?resizew=220)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba0fbd88fdb064072eedd136e9cb41ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ff9487843b6982a1b797a19ddc94ad7.png)
(2)棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b8badfeb9e7556486e02ab60df4dd32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b698101d0a83239ce4e1d9afbb61f17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
您最近一年使用:0次
解题方法
7 . 已知四棱锥
,底面
为正方形,且边长为2,
,
,
,F、M、N分别为PD、AD、BC的中点,E点在FM直线上运动.
![](https://img.xkw.com/dksih/QBM/2023/8/27/3312037303468032/3313471160762368/STEM/5e06c3ccb56743c8aad4942e4220b5be.png?resizew=223)
(1)求证:
∥平面
;
(2)当E为FM的中点时,求证:
平面
.
![](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/db27b7f29d7d01b2692f217bc3079fc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8538c3bf019e6290711cfa547ad5fd07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3077b532022113b4d85d47d730de23b.png)
![](https://img.xkw.com/dksih/QBM/2023/8/27/3312037303468032/3313471160762368/STEM/5e06c3ccb56743c8aad4942e4220b5be.png?resizew=223)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d8e33929752b1cb4dd36ee9b98b45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)当E为FM的中点时,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c7f7ffbb802aef097bbe1a9321691f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
您最近一年使用:0次
8 . 如图,在直三棱柱
中,点
、
分别为
和
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/dc67479f-01e4-4abd-8307-1cf201bdd9ea.png?resizew=201)
(1)证明:
平面
;
(2)若
,
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/dc67479f-01e4-4abd-8307-1cf201bdd9ea.png?resizew=201)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14d355b4c58b4e883b9e65cc6da8622e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e384e0ffc3d599303b77ee2a12221e.png)
您最近一年使用:0次
2020-09-25更新
|
932次组卷
|
3卷引用:广西玉林市田家炳中学2020-2021学年高二上学期质量检测数学试题
解题方法
9 . 在四棱锥
中,
平面ABCD,
,
.
(1)证明:
平面
;
(2)若
是
的中点,求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef7252c9e3a1aebe1b31d080ac7ea725.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b802b67ff805001ac88a6c85a795c07.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/22/2186bddd-12a8-473a-b3db-34fb1ca2c552.png?resizew=129)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8ccd4181f956f6e0140bf0ab8f0716.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
您最近一年使用:0次
名校
解题方法
10 . 在直三棱柱
中,
,
,
分别为
,
,
的中点.
![](https://img.xkw.com/dksih/QBM/2021/7/13/2763394570895360/2776347106164736/STEM/1db7c10580274fadbcce27ad5bf4f92d.png?resizew=148)
(1)若
,证明:
;
(2)证明:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.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/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e97fcdcfd6183b976a61ef3222c607.png)
![](https://img.xkw.com/dksih/QBM/2021/7/13/2763394570895360/2776347106164736/STEM/1db7c10580274fadbcce27ad5bf4f92d.png?resizew=148)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9874eca4abea481fa84eb772a920f9c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/810ee7bc82b6f452afb3fc18691abc3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8035fc825a001d7d9a3dacd8271662.png)
您最近一年使用:0次
2021-07-31更新
|
672次组卷
|
2卷引用:云南省昆明市2020-2021学年高一下学期期末数学试题