如图所示,在正方体
中,
分别是
的中点.求证:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/29/55d0e021-ab33-4d24-b39a-194028a354ef.png?resizew=173)
(1)
三线共点;
(2)直线
和直线
是异面直线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1ae536809b1161fd4e83fdc7f42be96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab7bf305e06adffa3b3452ad9b3826d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/29/55d0e021-ab33-4d24-b39a-194028a354ef.png?resizew=173)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/073b4a11d185c27970bd8b62bd822db1.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/408871c2b71ef88d6f556ce53cf73cc9.png)
22-23高二上·上海嘉定·开学考试 查看更多[5]
上海市上海大学附属嘉定高级中学2022-2023学年高二上学期开学考试数学试题山东省东营市广饶县第一中学2022-2023学年高二上学期10月月考数学试题(已下线)第一章 点线面位置关系 专题三 共点问题 微点1 立体几何共点问题的解法【培优版】(已下线)第10章 空间直线与平面(单元提升卷)-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(沪教版2020必修第三册)(已下线)专题02直线与直线的位置关系(6个知识点4种考法)-【倍速学习法】2023-2024学年高二数学核心知识点与常见题型通关讲解练(沪教版2020必修第三册)
更新时间:2022-09-28 04:56:47
|
相似题推荐
解答题-证明题
|
适中
(0.65)
解题方法
【推荐1】(1)如图,空间四边形
中,
、
分别是
、
的中点,
、
分别是
、
上的点,且
.求证:直线
与
的交点在直线
上.
![](https://img.xkw.com/dksih/QBM/2021/10/20/2833405355409408/2839722700570624/STEM/5290b13cb9b64426bc96eb3cb090a09a.png?resizew=170)
(2)如图,
,点
是平面
、
外一点,从点
引三条不共面的射线
,
,
,与平面
分别相交于点
、
、
,与平面
分别相交于
,
,
,求证
.
![](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/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd541d8a5e81d185e512e819de9d52b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2021/10/20/2833405355409408/2839722700570624/STEM/5290b13cb9b64426bc96eb3cb090a09a.png?resizew=170)
(2)如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/384a65ca1ee3d7d86b988ca34c885e18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.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/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e49b2e0225a40d1b0c75d724c2b712.png)
![](https://img.xkw.com/dksih/QBM/2021/10/20/2833405355409408/2839722700570624/STEM/415b70f0e0c94ffcaf36994475992ea2.png?resizew=220)
您最近一年使用:0次
【推荐2】如图,边长为4的两个正三角形
,
所在平面互相垂直,E,F分别为BC,CD的中点,点G在棱AD上,
,直线AB与平面
相交于点H.
;②直线HE,GF,AC相交于一点;
注:若两个问题均作答,则按第一个计分.
(2)求直线BD与平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a100d3638f0f04db2bd262c051f59b2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e011e5a622d961d9174ebce34c6ee033.png)
注:若两个问题均作答,则按第一个计分.
(2)求直线BD与平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe8a84ca3a13f82aff1a022edc66065.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图,在空间四边形ABCD中,点E在边AB上,点H在边BC上,点F,G都在边AD上.求证:直线EF,HG是异面直线.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/4/ea39192c-db2c-4a92-ad9f-0d947b2e123a.png?resizew=139)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】已知直线
为异面直线,且
与
不相交,求证:
为异面直线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f880e93459a7f3743063f23ae705949.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9a475fec8ded321e10a6697319fb975.png)
您最近一年使用:0次