如图,棱长为a的正方体
中,E,F分别为棱AB和BC的中点,
为棱
的中点.求证:
(1)
平面
;
(2)平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1859959fdb4c5edd8056893f94a10a0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/8/9f59b128-4e24-4668-b0a7-937d73fd1791.png?resizew=153)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4cd2b33bd983a9ed6575b9de04a46a.png)
(2)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/621626f25e2168ff460a776d91a07144.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22bbd32e44f7f14342896c93612d9f4d.png)
22-23高一下·全国·课后作业 查看更多[4]
人教B版(2019) 必修第四册 北京名校同步练习册 第十一章 立体几何初步 11.4 空间中的垂直关系 11.4.2 平面与平面垂直(二)(已下线)模块三 专题1 空间向及其运算 B能力卷(已下线)第02讲 1.1.2空间向量的数量积运算(7类热点题型讲练)-【帮课堂】2023-2024学年高二数学同步学与练(人教A版2019选择性必修第一册)(已下线)模块三 专题1 空间向及其运算 B能力卷 (人教B)
更新时间:2023-06-05 16:21:04
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相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,在四棱锥
中,
底面
,
,
,
⊥
,
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/2016/12/12/1579120694812672/1579120695386112/STEM/6a83fb0b4b3b44fcb29c093f06e59902.png)
(1)证明:
平面
;
(2)证明:
⊥平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6153163fecdf3f410411048428ccaef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/551e4cd76a93de89ea2750160fe74923.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bcb872b4cef76b937c60d5d90c37ee1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ace900749d0861aa51fcc6d72c51f82c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2016/12/12/1579120694812672/1579120695386112/STEM/6a83fb0b4b3b44fcb29c093f06e59902.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9d32e76582bf550593fdef53e081225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,已知多面体
均垂直于平面
.
平面
;
(Ⅱ)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23db5546be443960a6f60d74fc73aa9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7fd39ce08557c87dd3ec25bf5f3e7f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4560fa4ad459b58b723c74bd24e51ebf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
(Ⅱ)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd06851d747f8ccf046bc807b2523e65.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
【推荐3】如图,在四棱锥
中,底面
是正方形,
底面
,
.
为
中点,求证:
平面
;
(2)求平面
与平面
的夹角.
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce03b310edce42191f9fa75a1c909ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acd3bd9c2db8c9f3cb8c6c7d7cbf5465.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b60870baa5e3fbc33a749aa5f0a94be.png)
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解答题-问答题
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适中
(0.65)
解题方法
【推荐1】如图,在棱长为2的正方体
中,
分别是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/30/9ff418f3-da9a-4796-ae12-8bb329bae8f4.png?resizew=152)
(1)求平面
截正方体所得截面面积;
(2)证明:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b094411c562930ff2d67b582cfd48cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b37c6f82c1eed122cc0749ac25ff114.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/30/9ff418f3-da9a-4796-ae12-8bb329bae8f4.png?resizew=152)
(1)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e2da608b66c9aee03e2503388ba4fd.png)
(2)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4a46fbde58e12b1edc038ae9e921722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed4cba9d2412e4a28f8740bddd5738d4.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】如图,在四棱锥
中,底面
是矩形,
,
,已知
,且
平面
,
,
.在线段FG上确定一点M使得平面
平面PFG,并说明理由;
![](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/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41b7c465b9e7cab8bb5bbde8fd110fd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db807b09cc550f476b3f8fa0c6a14425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75e4c754808cef21d0e87afe14455bd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bb1a9854f58bdfa19965b9b66b324e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80deda85e1c07a6771f335fa392a2514.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/22/f3e72502-d869-4345-a39b-a0cb701b923b.png?resizew=165)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
名校
【推荐1】如图,棱长为
的正四面体(四个面都是正三角形)
,
是棱
的中点,点
在线段
上,点
在线段
上,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/09b147fe-ed07-4852-89df-e1a29c45165f.png?resizew=197)
(1)用向量
,
,
表示
;
(2)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17ac9904467780bca2f8d563d1ac7f65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df8de8d51bd35d920e70be7364b4915d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/09b147fe-ed07-4852-89df-e1a29c45165f.png?resizew=197)
(1)用向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d60dcb171bb7fd972aab8294d63acdb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f68628a408537b1cf3bf1ca2a69731b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20ec3efaa6b6ff5769e8999df5714a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cec64476aaca08de0808afda3618109c.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f0e6d3115e900f1a359ec4f894e8896.png)
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【推荐2】如图,正四面体(四个面都是正三角形)OABC的棱长为1,M是棱BC的中点,点N满足
,点P满足
.
![](https://img.xkw.com/dksih/QBM/2023/11/24/3374986319036416/3375840635854848/STEM/276dab81a63048fba403acb7bd99294c.png?resizew=134)
(1)用向量
,
,
表示
;
(2)求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa3acd6a986ae48576c81bee1cce17f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cca9fb05c44f1daf944ed74689692e2.png)
![](https://img.xkw.com/dksih/QBM/2023/11/24/3374986319036416/3375840635854848/STEM/276dab81a63048fba403acb7bd99294c.png?resizew=134)
(1)用向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f605ec0729ce6d72237ad662a06862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fc9656d8286c4d6fa309d6ae347c89e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef8337706c550bc095d7a2bd872221a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91174b2336306191ba275a87864172b7.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f0043d442fc7bd9177c2e3716d3d762.png)
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