如图,四面体ABCD中,点E,F分别为线段AC,AD的中点,平面
平面
,
,
,垂足为H.
![](https://img.xkw.com/dksih/QBM/2020/11/18/2595204682768384/2601979299405824/STEM/a02fff92-5ea3-4f41-8c97-80ec262792ac.png)
(1)求证:
;
(2)求证:平面
平面ABC.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7898ccc0ec40a1460fae5b5bf6bc001.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddb409de7d8056cdef2cd68080fe47ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7903326ef7b584fb53651194b7541fc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a7cf70f8772d8fea4599b18df2c88f.png)
![](https://img.xkw.com/dksih/QBM/2020/11/18/2595204682768384/2601979299405824/STEM/a02fff92-5ea3-4f41-8c97-80ec262792ac.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cf85bbbf81e16ba6da39bfebf0e09a7.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d443d65476dd21c8e1f9345b3f13439e.png)
20-21高二上·四川·期中 查看更多[6]
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四川省成都市蓉城名校联盟2020-2021学年高二(高中2019级)上学期期中联考文科数学试题(已下线)第二章+点、直线、平面之间的位置关系(能力提升)-2020-2021学年高一数学单元测试定心卷(人教版必修2)四川省内江市第六中学2020-2021学年高二上学期第三次月考数学理科试题四川省内江市第六中学2020-2021学年高二上学期第三次月考数学文科试题四川省成都市2020-2021学年高二上学期期中数学理科试题
更新时间:2020-11-27 14:43:20
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相似题推荐
解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】如图,在四棱锥
中,侧棱
底面
,四边形
为正方形,且
,点
为棱
的中点,点
为棱
上一点.
为
中点,求证:
平面
;
(2)若点
满足
,
(i)求证:
;
(ii)求直线
与平面
所成角的正切值.
![](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/37e2267c84394668eff2e9f5918de4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/073a88b42836fb88433679932b48ad03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a4a6a1e70241d600bc6c104313eac61.png)
(i)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df44d1ff1227c4de03ca21ac87f3f86a.png)
(ii)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
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解题方法
【推荐2】圆柱
如图所示,
为下底面圆的直径,
为上底面圆的直径,
底面
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2022/5/25/2986891897692160/2987724381298688/STEM/5a8b1c56-2246-4566-89d0-40b77e3baf1d.png?resizew=155)
(1)证明:
面
.
(2)求圆柱
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d212c1709b8e72a055cf1b5381ef64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7de966c316db1013defc56372fcf814e.png)
![](https://img.xkw.com/dksih/QBM/2022/5/25/2986891897692160/2987724381298688/STEM/5a8b1c56-2246-4566-89d0-40b77e3baf1d.png?resizew=155)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/574a6cff0aca240f071ed933c28e32f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e2da608b66c9aee03e2503388ba4fd.png)
(2)求圆柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
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解题方法
【推荐1】如图,在四棱锥
中,底面
为平行四边形,
,
,
,且
底面
.
![](https://img.xkw.com/dksih/QBM/2018/8/8/2006176977625088/2013877062639616/STEM/f60fe809bba744d0829c51876953391c.png?resizew=219)
(1)证明:
平面
;
(2)若
为
的中点,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/f80f51c31583fea58fde645474d60b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e0b64d25ddd18454f88e40c45d7d8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/300ee27f04188cb8ee5e20394c8f50fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2018/8/8/2006176977625088/2013877062639616/STEM/f60fe809bba744d0829c51876953391c.png?resizew=219)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2e40a351eff6e90e3008328eca0cc8f.png)
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【推荐2】如图,三棱柱
中,侧面
为菱形,
.
![](https://img.xkw.com/dksih/QBM/2018/2/25/1889982062616576/1892707424845824/STEM/24006250b0714b7b9aa80fdc8700dfd0.png?resizew=265)
(1)证明:
;
(2)若
,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ee347187fbbfe9e8a6faf286795d79.png)
![](https://img.xkw.com/dksih/QBM/2018/2/25/1889982062616576/1892707424845824/STEM/24006250b0714b7b9aa80fdc8700dfd0.png?resizew=265)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7870cee007535b979d35bc7feab75616.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d579d07ced4cc2c657ecfa0db385ae1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51634de857372030f517736f256808f8.png)
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解题方法
【推荐3】如图所示,在直三棱柱
中,
,
平面
,D为AC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/1fee27f7-b069-4ad4-b990-0021d1baeb02.png?resizew=158)
(1)求证:
平面
;
(2)求证:
平面
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d33ebce3dd8905d4f954015823fa480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cdf60b46965a33b15fec40f733d9c0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d1d2e0f281222a5f289ea4008370aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/1fee27f7-b069-4ad4-b990-0021d1baeb02.png?resizew=158)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac5ea494bb75a5c04e61c9e32aceabc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a59d296654aa17749f8300ae1d1da0e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
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【推荐1】如图,在平行四边形
中,
是
上靠近点
的三等分点,过点
作
,分别交
,
于点
,
,将
沿
折起至
.
,求证:平面
平面
;
(2)若
在线段
上,当
为何位置时,
平面
.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5486478d317b66a6830138d6e87f752.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/164a4df60a15587971e883cf557b5ce2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f45daa08d8d7105dc9bad40f7c7a745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8d3a3f9bae62377ff6e18e7d94e21d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6bfad3f7e65188bcf7f62ea5acdbf4a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/124e1461a6c8df9f47bca2f1dc1352f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
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【推荐2】如图,在四棱锥
中,
是棱PD的中点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/5de16798-30fd-46cd-a8d8-378ce6244756.png?resizew=172)
(1)求证:CD∥平面ABE;
(2)求证:平面ABE丄平面PCD.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e295553db2cb01af82fcd90b2cac6c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e5b4ea605cf0b98e428d071f6be6762.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/5de16798-30fd-46cd-a8d8-378ce6244756.png?resizew=172)
(1)求证:CD∥平面ABE;
(2)求证:平面ABE丄平面PCD.
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【推荐1】如图,在四棱锥
中,底面ABCD是正方形,且
,
,
,
.
(1)设平面
平面
,证明:
.
(2)E是线段PA上的点,且
,二面角
的正切值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed6281306726065e7075c579b9b66537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e12bfde565540f059dd27ea47dfaa7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/9/8199ae84-5e62-4a81-9ac0-11e599c8e184.png?resizew=172)
(1)设平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1084a42a7b7600ac9651a023de6d3401.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebae74545340ce6971f437d129e9c659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ded7e84e5d68905bc8cf249fbfbe2.png)
(2)E是线段PA上的点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c557c195404019d734f85bc7c3a2ae10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e4be6ee295b46490a1eed671b6975a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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【推荐2】如图,在四棱锥P-ABCD中,E是棱PC上一点,且2
=
+
,底面ABCD是正方形,平面ABE与棱PD交于点F,平面PCD与平面PAB交于直线l.求证:l∥EF.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8287a29a7d8825e8721ff60277fa3d19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/237889e5a8ce0918e95fc9c91b65bfac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa852f7318d1eb2cc3dd877768d8ad2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/00f21eed-6690-4682-8178-cb1146b4665b.png?resizew=199)
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【推荐3】如图,在四棱锥
中,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/12/b679aafe-fd0d-48b3-abc7-fd0a6cbc2a2b.png?resizew=170)
(1)设平面
平面
,求证:
;
(2)若
为
中点,平面
与平面
有可能垂直吗?请说明理由.
![](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/cfa319587e548f99e1d07bf5cdc5b3ea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/12/b679aafe-fd0d-48b3-abc7-fd0a6cbc2a2b.png?resizew=170)
(1)设平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c659d2ab07b9b66ed9a60cb604dd9aa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3e61111c1e9b98b79615f75540175c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/562f75f5924c93cea835fd25a45a2a98.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3653ada76ba0c8afe9d57c8e7832c6ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29f491a794b9ac1a85a18c87ecee616c.png)
您最近一年使用:0次