解题方法
1 . 在直三棱柱
中,
,
、
、
分别为
、
、
的中点,
,点
在线段
上,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/d8cc2a2f-a20d-44d9-9b5f-9b69791e22fb.png?resizew=146)
(1)当
时,证明:
平面
;
(2)当
为何值时,点
到平面
的距离为
?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34c488b33d3d0bbaa79ceaaab9980d48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.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/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d6e8b2e3eede9ae5dcd8ece3f2ed70e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0481b7c34a87320e466bd8d4aa094872.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13e87088da41685cc8d433fbbe0e18d6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/d8cc2a2f-a20d-44d9-9b5f-9b69791e22fb.png?resizew=146)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8845fadc307f1d308410e829becedd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e21b3c5a71df7c74739468de3553057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45d365ce9f4bacc4d4bb15dbdb5306a5.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3653ada76ba0c8afe9d57c8e7832c6ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a69d166677557cadb3da32b4a7e152e3.png)
您最近一年使用:0次
2022-12-27更新
|
195次组卷
|
2卷引用:河南省洛阳市普高联考2022-2023学年高三上学期测评卷(三)文科数学试题
名校
解题方法
2 . 如图,在四棱锥
中,
,垂足为
,
平面
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/7ddae2fb-9997-480b-9e93-7ba2710a3df8.png?resizew=182)
(1)证明:平面
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc1f76257275ab4b04f9bc913535670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e126c16032892966489053f44b9048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1762672dcde15e979996ce0b0f663a75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07445aa3909818a3ef93bb01182f545f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26ea9e9e42ced4f9b7540b368fbd171.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/7ddae2fb-9997-480b-9e93-7ba2710a3df8.png?resizew=182)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04c222223dae9ef27d4c132534d9848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2022-12-27更新
|
147次组卷
|
2卷引用:河南省部分重点高中2022-2023学年高三上学期12月联合考试数学(文)试卷
名校
解题方法
3 . 如图,在三棱柱
中,侧面
底面
,
,
,且
,
为
中点.
![](https://img.xkw.com/dksih/QBM/2022/8/25/3052106803642368/3058231501807616/STEM/fcc2dcadb93e4ee5970fa6e1bd364e7a.png?resizew=288)
(1)求证
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb88c278e18d776f165bc571031071d8.png)
(2)在
上是否存在一点
,使得![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
平面
,若不存在,说明理由;若存在,确定点E的位置.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0671b4776e142e17a79af5b3f0378ef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a58bd6407cc044990cc765df9e710369.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2022/8/25/3052106803642368/3058231501807616/STEM/fcc2dcadb93e4ee5970fa6e1bd364e7a.png?resizew=288)
(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb88c278e18d776f165bc571031071d8.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc9ffc43a56921fe79f8602636b8b0f.png)
您最近一年使用:0次
2022-09-03更新
|
560次组卷
|
3卷引用:河南省洛阳市洛宁一高祥云联考2022-2023学年高二上学期8月阶段性考试数学试题
河南省洛阳市洛宁一高祥云联考2022-2023学年高二上学期8月阶段性考试数学试题河南省禹州市北大公学禹州国际学校2022-2023学年高二上学期开学考试数学试题(已下线)专题6-3立体几何大题综合归类-1
解题方法
4 . 如图,在直三棱柱
中,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/13/d3af5aff-0049-4752-be04-950d6cb43aeb.png?resizew=179)
(1)证明:
.
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f3be3dcde7b744f420a588cb8dd5b01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/13/d3af5aff-0049-4752-be04-950d6cb43aeb.png?resizew=179)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2e5dc81fbafbe58bff0842f7776d80a.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3120955852eb060caf374eb031adca8.png)
您最近一年使用:0次
名校
解题方法
5 . 如图,在四棱锥
中,底面ABCD是平行四边形,E,F分别是CD,PB的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/a7594f3f-1235-449f-abc9-c2ebee1a4fcc.png?resizew=140)
(1)证明:
平面PAD.
(2)若四棱锥
的体积为32,
的面积为4,求B到平面DEF的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/a7594f3f-1235-449f-abc9-c2ebee1a4fcc.png?resizew=140)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
(2)若四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
您最近一年使用:0次
2022-12-03更新
|
861次组卷
|
5卷引用:河南省新乡市2022-2023学年高三上学期第一次模拟考试文科数学试题
解题方法
6 . 如图,在四棱锥
中,底面
为正方形,
底面
,
,
为线段
的中点,
为线段
上任一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/7/fdb7eee4-edb8-41f6-81e3-6fc50b63d6b1.png?resizew=213)
(1)试确定
点的位置,使得
平面
;
(2)证明:平面
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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829f9180ddd9aa1a0ee0dc520f4e0b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/7/fdb7eee4-edb8-41f6-81e3-6fc50b63d6b1.png?resizew=213)
(1)试确定
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36222db36e348661eb5f616820e4e60f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
(2)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6501f1c913a4ef64957a2f01ab5baa15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
名校
7 . 如图,在几何体
中,
平面
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/210542ba-e075-4461-acea-902c79862463.png?resizew=168)
(1)证明:平面
平面
;
(2)若
,
,三棱锥
的体积为
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e839ac941e8bf536ff35a12e56c7a400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3d2d3643a9579f2c693ef86909441e2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/210542ba-e075-4461-acea-902c79862463.png?resizew=168)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d7c88c481a78a38809b3abfe64c8d7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f332555e65843f32f4c623098c6adc72.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338c6c83ab4abc895ac36ab888a55be6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f332555e65843f32f4c623098c6adc72.png)
您最近一年使用:0次
2022-12-01更新
|
504次组卷
|
2卷引用:河南省顶级名校2022-2023学年高三上学期12月摸底考试数学(文)试题
名校
解题方法
8 . 在三棱台
中,
平面
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/755d26fa-fa65-4f0a-939e-b3e487dc251d.png?resizew=174)
(1)证明:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4676f68b88ac1df0649917b0b0927053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb67fcfd9fdd23d52704b75872c9b49.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/755d26fa-fa65-4f0a-939e-b3e487dc251d.png?resizew=174)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8bfe2553e852df73185d017c0a62fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b94e97d085cea077cb82a0b7d2f523e.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c16cf65b1681cb65c86dc0b9635234.png)
您最近一年使用:0次
2022-12-06更新
|
469次组卷
|
5卷引用:河南省青桐鸣2023届高二上学期11月联考数学试题
解题方法
9 . 如图,在三棱锥
中,
,
,O为棱AC的中点.
![](https://img.xkw.com/dksih/QBM/2022/7/1/3013237568692224/3014442459144192/STEM/0df85cc4f66942289b322502b0037232.png?resizew=226)
(1)证明:
平面
;
(2)若点M在被AB上,且A到平面POM的距离为
,求平面POM将三棱锥
分成的左、右两部分的体积之比.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b370b7ca2390e41f13ccf2217fc85071.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4db3cc075b88dea374e92f94a178aa20.png)
![](https://img.xkw.com/dksih/QBM/2022/7/1/3013237568692224/3014442459144192/STEM/0df85cc4f66942289b322502b0037232.png?resizew=226)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e126c16032892966489053f44b9048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若点M在被AB上,且A到平面POM的距离为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
您最近一年使用:0次
名校
解题方法
10 . 如图所示,在四棱锥
中,底面
是边长为4的正方形,
,点
在线段
上,
,点
分别是线段
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/3/744d2351-63e3-42ff-8fa2-c33b85798193.png?resizew=189)
(1)证明:
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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3e05b6d03d24f932d6df32afe14aa79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae25bdfe94839f26e9a151d33e44723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cf33d73483c93f24cc6a1d76ef22ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481e426224c3a3ce9bb5a731eed81c40.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/3/744d2351-63e3-42ff-8fa2-c33b85798193.png?resizew=189)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9bbc7e0de28c652ae10a8db5b4e2687.png)
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2022-07-02更新
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4卷引用:河南省焦作市2021-2022学年高一下学期期末数学试题