1 . 已知在空间直角坐标系
中,点
,
,
,
的坐标分别是
,
,
,
,过点
,
,
的平面记为
.
(1)证明:点
,
,
,
不共面;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e336d6ca2cae3d6e6c3810d7e521a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1e1c85bd0622e0cba606d98416af4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0dc52b36189cf1dbc42e75af3fe295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1802f872a07a0ffd30ddb6e2449cda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8047a2ef424999a64178bc0ff391c62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(1)证明:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
您最近一年使用:0次
解题方法
2 . 已知直三棱柱
,
,
,
,
分别为
,
,
的中点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/a8446c35-c50f-4508-b952-b6df98e40a06.png?resizew=148)
(1)求证:
平面
;
(2)求
;
(3)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2af2626608f61a4cfbb86494bd6df0e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb4bf0cd5d0f1cd6dee1eee88d34e0ad.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/a8446c35-c50f-4508-b952-b6df98e40a06.png?resizew=148)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f96c673a2381f118ea2d3efc0bca1f3.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/757ef0bdb7fbd0e05acf10023b011527.png)
您最近一年使用:0次
2020-08-05更新
|
748次组卷
|
7卷引用:山东省威海市2020届高三三模数学试题
山东省威海市2020届高三三模数学试题山东省威海市2020届高三第二次模拟数学试题(已下线)专题04 立体几何——2020年高考真题和模拟题理科数学分项汇编(已下线)专题20 立体几何综合-2020年高考数学(理)母题题源解密(全国Ⅱ专版)(已下线)第六单元立体几何初步(B卷 滚动提升检查)-2021年高考数学一轮复习单元滚动双测卷(新高考地区专用)(已下线)专题九 立体几何与空间向量-山东省2020二模汇编(已下线)理科数学-2021年高考数学押题预测卷(新课标Ⅱ卷)03
名校
解题方法
3 . 如图,在多面体
中,
是边长为4的等边三角形,
,
,
,点
为
的中点,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/7683222c-b6fc-4beb-8bc7-827a11cab5f8.png?resizew=133)
(1)求证:
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)线段
上是否存在一点
,使得二面角
为直二面角?若存在,试指出点
的位置;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba5c70f4ec3913a79c8f9b35ef5e9084.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/587df01a98f499a9f361aafd8c3dac39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74822fd2c2d3babbf7e0b3adba4f5763.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b474210a0d8ed97f0dc1503416f2faf0.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/683327b67c3cb6f4b6cef5b729b2ccb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/7683222c-b6fc-4beb-8bc7-827a11cab5f8.png?resizew=133)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78172568aac9805d2ea2d5f742bf80c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3f4655b2adaac6ea7165af9c1a3881.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
您最近一年使用:0次
2020-07-22更新
|
3731次组卷
|
7卷引用:2020届河北省衡水中学高三下学期三模数学(理)试题
2020届河北省衡水中学高三下学期三模数学(理)试题海南、山东等新高考地区2021届高三上学期期中备考金卷数学(A卷)试题(已下线)调研测试二(B卷 滚动提升检测)-2021年高考数学(理)一轮复习单元滚动双测卷(已下线)重难点3 空间向量与立体几何-2021年高考数学【热点·重点·难点】专练(山东专用)(已下线)专题20 立体几何综合——2020年高考数学母题题源解密(山东、海南专版)浙江省杭州第二中学2021届高三下学期3月开学考试数学试题浙江省杭州市第二中学2021-2022学年高三上学期9月返校考试数学试题
名校
4 . 如图,在三棱锥
中,
平面
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/12/25/2621629187497984/2623423126339584/STEM/a233f59abca341e3b70f95227a4119ad.png?resizew=186)
(1)证明:
;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/822ba132ca9dd0d4a050659aef3c9b26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d001be02aec8fa6d094a80d0115430ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://img.xkw.com/dksih/QBM/2020/12/25/2621629187497984/2623423126339584/STEM/a233f59abca341e3b70f95227a4119ad.png?resizew=186)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e4b16c2c6c9bd089da78122e9d2511.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a438393ddfc7da1804baf4932442bb35.png)
您最近一年使用:0次
名校
5 . 如图, 四棱柱
中, 侧棱
底面
,
,
,
,
,
为棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/0adea47f-a1e3-4cf2-bf8e-75f1e121632a.png?resizew=181)
(1)证明
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ecf072589c0f901d92f6bda111d841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd8e727e4efc22b49649f71ae9c9d84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/633bf2de732ae51fc06ef3d559915da0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4339a40ae9d1947ec3a4b3e2fa3a16cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/0adea47f-a1e3-4cf2-bf8e-75f1e121632a.png?resizew=181)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c5d45ab52f512e79ab0f6cb435a6beb.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f77012443217a7fde3f16a6aa6bf4615.png)
您最近一年使用:0次
2020-12-16更新
|
111次组卷
|
2卷引用:湖南省长沙市长沙县第九中学2020-2021学年高二上学期第三次月考数学试题
名校
6 . 如图,在四棱柱
中,侧棱
底面
,
,
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/8d76eb9a-82f5-4b41-9493-3801b4ff26c3.png?resizew=154)
(1)证明:
;
(2)求二面角
的正弦值;
(3)设点
在线段
上,且直线
与平面
所成角的正弦值是
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ecf072589c0f901d92f6bda111d841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/633bf2de732ae51fc06ef3d559915da0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35909b72f6e48a33ae9abb1d63ff91aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a696a182fff038a86b2bbe8ca099442.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/8d76eb9a-82f5-4b41-9493-3801b4ff26c3.png?resizew=154)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c5d45ab52f512e79ab0f6cb435a6beb.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f77012443217a7fde3f16a6aa6bf4615.png)
(3)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e516121599c9fcc528121c00afcf52fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab52a9c7f7b361ad0488f01d714135fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
您最近一年使用:0次
2020-11-06更新
|
805次组卷
|
2卷引用:天津市耀华中学2021届高三(上)暑假验收数学试题
2020高三·全国·专题练习
解题方法
7 . 如图,在四棱柱ABCDA1B1C1D1中,底面ABCD是平行四边形,E,F,G分别是A1D1,D1D,D1C1的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/4ffa9c6e-c20b-4253-bab7-c050c7797405.png?resizew=203)
(1)试用向量
,
,
表示
;
(2)用向量方法证明平面EFG
平面AB1C.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/4ffa9c6e-c20b-4253-bab7-c050c7797405.png?resizew=203)
(1)试用向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1fe2d802f2b37e7db198c5a3c1df9a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/228f4ddbb8959f904d71259be7c6ab36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d0ed5745ba16ce0dd9c04e90352411.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7b1ee3217b5a9e19488f4b98fd36c9f.png)
(2)用向量方法证明平面EFG
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
您最近一年使用:0次
19-20高二·全国·课后作业
解题方法
8 . 已知正方体ABCD-A1B1C1D1中,E是棱CC1上的动点,求证:A1E⊥BD.
您最近一年使用:0次
19-20高二·全国·课后作业
解题方法
9 . 已知正三棱柱ABC-A1B1C1的各棱长都为1,M是底面上BC边的中点,N是侧棱CC1上的点,且CN=
CC1.求证:AB1⊥MN.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/11/fd411ee1-a60e-480b-aeeb-b8bbd3371af1.png?resizew=146)
您最近一年使用:0次
名校
10 . 在平面直角坐标系
中,已知点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0196bcd335497fa388a32dc21b7ac1eb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/a7380ed9-abcd-4c82-a5c9-fd490491237d.png?resizew=216)
(1)证明:存在点
使得
,并求
的坐标;
(2)过点
的直线
将四边形
分成周长相等的两部分,求该直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/485be495bd20b3a3f4653cb548b9a008.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0196bcd335497fa388a32dc21b7ac1eb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/a7380ed9-abcd-4c82-a5c9-fd490491237d.png?resizew=216)
(1)证明:存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c8bc233a9902789a716fa0a31558dc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次