如图,在侧棱垂直底面的四棱柱
中,
,
,
是
的中点,
是平面
与直线
的交点.
![](https://img.xkw.com/dksih/QBM/2018/11/14/2075305500991488/2077721101279232/STEM/4abe1f3cbf514a1db50e67dfe88e02e5.png?resizew=158)
(1)证明:
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6151468904c32d230da58dca8193a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e229bceadec8b21c1bc223afec2ba30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd823da794135c17889c2a2d42d0a149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/2018/11/14/2075305500991488/2077721101279232/STEM/4abe1f3cbf514a1db50e67dfe88e02e5.png?resizew=158)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a6ae26c4f22782320ce79f473c3ddd4.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4117c286a359c3c50a3a918817deadbf.png)
更新时间:2018-11-17 21:57:18
|
相似题推荐
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,已知梯形
中,
,
,四边形
为矩形,
,平面
平面
.
平面
;
(2)求平面
与平面
的夹角的余弦值;
(3)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b82877dc58dc6ec36e54de3f1e252b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd1e2c273d6413383af978b52b1cd64f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377b5f7197e5bd1afeea4d931307956a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15ea464a0929a33bedd2ee95cdb66ba8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a2b5cfae407016cad45bbdefea05833.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
(3)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3daec02423dbc4bf84b8ec462d12b683.png)
您最近一年使用:0次
【推荐2】如图,四棱锥
,
平面ABCD,
为等边三角形,
,B,D位于AC的异侧,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/29/d6266c39-eb4d-45ce-b01c-fb3ea00a6923.png?resizew=143)
(1)若
,求证:平面
平面PBD;
(2)若直线
平面PAD,求四棱锥
的体积.
![](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/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/29/d6266c39-eb4d-45ce-b01c-fb3ea00a6923.png?resizew=143)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,在四棱锥P—ABCD中,底面ABCD是矩形,PD⊥平面ABCD,M是棱PC的中点,点N在棱PB上,且MN⊥PB.
![](https://img.xkw.com/dksih/QBM/2022/3/19/2939484960694272/2944654749179904/STEM/8bd44f38-2578-4ead-aca5-3f0e27a3a43a.png?resizew=184)
(1)求证:
平面BMD;
(2)若AD=2CD,直线PC与平面ABCD所成的角为60°,求平面DMN与平面PAD所成的锐二面角的余弦值.
![](https://img.xkw.com/dksih/QBM/2022/3/19/2939484960694272/2944654749179904/STEM/8bd44f38-2578-4ead-aca5-3f0e27a3a43a.png?resizew=184)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/373f735f0f04d11f1951eaef1bb78b6a.png)
(2)若AD=2CD,直线PC与平面ABCD所成的角为60°,求平面DMN与平面PAD所成的锐二面角的余弦值.
您最近一年使用:0次
【推荐2】如图,四棱锥
中,底面
是梯形,
,
,
,M为边PC的中点.
(1)求证:
平面
;
(2)求证:平面
平面
;
(3)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/7bce559fceb4731f8d4323410075a22b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24910cc9f4671a755b3c44740a0fccf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1720da6d65e7fa854d98322d3864240.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/31/021b2372-3806-494e-8fdd-c9371490cf00.png?resizew=203)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d55d609d417f8ecc01b5309edff6ecfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8db2bec6ebe672e8f83f24e9bdf4654.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐1】如图,在以
为顶点,母线长为
的圆锥中,底面圆
的直径长为2,点
在圆
所在平面内,且
是圆
的切线,
交圆
于点
,连接
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/809ddcbf-d64d-4915-a00b-132fb841b8ba.png?resizew=198)
(1)求证:
平面
;
(2)若
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/683c590673eece14fea3319c4fd5eb55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/809ddcbf-d64d-4915-a00b-132fb841b8ba.png?resizew=198)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45fbffb9e2c7fa7c5006cde8da0cabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/069bce57ad755d2340de357a67b8ae07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
解题方法
【推荐2】如图,四边形
为平行四边形,点
在
上,
,且
.以
为折痕把
折起,使点
到达点
的位置,且
.
(1)求证:平面
平面
;
(2)若直线
与平面
所成角的正切值为
,求点
到平面
的距离.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10cc6253667c3dc31209bce3e682c0dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c38dfd14dde969702dff97ef2270f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f460edcced5597615113c0fdc95b1dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ffcd654e4bf0e87eecf234944443200.png)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0076fa490815599f5b31683123bbfdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4739afd7311501e948aa4e1e5c1cb17.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83303d3784492506fc44f2b4d6b07bc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
![](https://img.xkw.com/dksih/QBM/2020/9/23/2556052469784576/2560400392118272/STEM/8f5aa8080a504cc28a02ced85975fc36.png?resizew=265)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
解题方法
【推荐3】如图,在四棱锥
中,
平面
,且四边形
是正方形,
,
,
分别是棱
,
,
的中点.
(1)求证:
平面
;
(2)若
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/411b38a18046fea8e9fab1f9f9b80a5f.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/8/1a8ad366-afe4-40d0-a00d-8df32bb8cf71.png?resizew=168)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8bc5d8308a060d6068cfc9f69fe79e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24dc8826770249f3996b8a188c03da92.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24dc8826770249f3996b8a188c03da92.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,
为空间四边形
的边
上的点(除端点外),且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/191745ccc3e10150ae3975c04ab468c6.png)
![](https://img.xkw.com/dksih/QBM/2022/11/3/3101499703418880/3101883113603072/STEM/bde96a902c6d429d8fd059330ce24ca6.png?resizew=127)
(1)求证:
;
(2)若
为
的中点,
点满足
,求证:
必交于一点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42c2d86d8daea5e652d99fe1c6bc3f9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a337a934b801730321f67b0e5a0b144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/191745ccc3e10150ae3975c04ab468c6.png)
![](https://img.xkw.com/dksih/QBM/2022/11/3/3101499703418880/3101883113603072/STEM/bde96a902c6d429d8fd059330ce24ca6.png?resizew=127)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/867e6a40f2a8f495515356172d65aadd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20356a6e276df288d1cde03fd0911f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7636af8ebd761ebe5d637c86e6554c6.png)
您最近一年使用:0次
【推荐2】如图,已知圆锥的顶点为
,底面圆
的直径
长为
,点
是圆上一点,
,点
是劣弧
上的一点,平面
平面
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/31/429ee2e8-6b5f-470f-95c9-e81f236b5939.png?resizew=199)
(1)证明:平面
平面
.
(2)当三棱锥
的体积为
时,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9df4dc9a70b7d99de2586f3e2935bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667349d99185bb045030b733352ff7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c762937111e04018cad6b507a7dedc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baceb049bf16ed0fd33639fdda0ec5ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c29f3123f57b56444be9bc048eacc82.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/31/429ee2e8-6b5f-470f-95c9-e81f236b5939.png?resizew=199)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7392e9e2da5a0e9ecab0f79992656328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15b63176f43bc7a0654d0f6f45e7429.png)
(2)当三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b2a4541d85e8710408c45c99950b6af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d599cb4a589f90b0205f24c2e1fa021e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
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解答题-证明题
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【推荐3】如图,在三棱柱
中,四边形
是边长为4的菱形,
,点D为棱
上动点(不与A,C重合),平面
与棱
交于点E.
![](https://img.xkw.com/dksih/QBM/2022/9/4/3059253486567424/3062120765620224/STEM/c477a849af1d4c23b0f337c28dd073cc.png?resizew=259)
(1)求证
;
(2)若平面
平面
,
,
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae617fbbfc82b69086f5184bd5cbca26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fefd737df2c1884834312b4c4f1a16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://img.xkw.com/dksih/QBM/2022/9/4/3059253486567424/3062120765620224/STEM/c477a849af1d4c23b0f337c28dd073cc.png?resizew=259)
(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/864576d97b4cc74d855f4252c63a68b9.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b67bd44e1d9d2739714f0b9cf3bc046.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e3c9e7c05de9838c0c5d762720d3ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ea6d2a253bdcecb8608b4004ebd68c0.png)
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