在直三棱柱ABC﹣A1B1C1中,BC=CC1,AB⊥BC.点M,N分别是CC1,B1C的中点,G是棱AB上的动点.
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572462281269248/1572462287347712/STEM/af60347b036b43508ebf6a5d8329bcd1.png)
(Ⅰ)求证:B1C⊥平面BNG;
(Ⅱ)若CG∥平面AB1M,试确定G点的位置,并给出证明.
![](https://img.xkw.com/dksih/QBM/2016/1/22/1572462281269248/1572462287347712/STEM/af60347b036b43508ebf6a5d8329bcd1.png)
(Ⅰ)求证:B1C⊥平面BNG;
(Ⅱ)若CG∥平面AB1M,试确定G点的位置,并给出证明.
更新时间:2016-12-04 01:25:37
|
相似题推荐
解答题-证明题
|
适中
(0.64)
【推荐1】如图,在直三棱柱ABC-A1B1C1中,
,点E、F、G分别是AA1、
AC、BB1的中点,且CG⊥C1G .
![](https://img.xkw.com/dksih/QBM/2015/1/5/1571945279684608/1571945285337088/STEM/e4a5a4a1c82e46c680ada37aad88696e.png)
(1)求证:CG//面BEF;
(2)求证:面BEF⊥面A1C1G .
![](https://img.xkw.com/dksih/QBM/2015/1/5/1571945279684608/1571945285337088/STEM/ffbbf3d362a54cc5a1742fe2fe7180c6.png)
AC、BB1的中点,且CG⊥C1G .
![](https://img.xkw.com/dksih/QBM/2015/1/5/1571945279684608/1571945285337088/STEM/e4a5a4a1c82e46c680ada37aad88696e.png)
(1)求证:CG//面BEF;
(2)求证:面BEF⊥面A1C1G .
您最近一年使用:0次
解答题-证明题
|
适中
(0.64)
【推荐2】如图,三棱的柱,
中,
平面
,
,点
在线段
上,且
.
![](https://img.xkw.com/dksih/QBM/2016/5/30/1572653876027392/1572653882204160/STEM/d1110d51ed5540d2b19ee9f25ac97448.png)
(1)求证:直线
与平面
不平行;
(2)设平面
与平面
所成的锐二面角为
,若
,求
的长;
(3)在(1)的条件下,设平面
平面
,求直线
与
所成的角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f47d6a88e962cd790d2f159c021ec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19434b67703318b18be7efee7be590bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4f0e00fa66a406e2b1e74fe93da57a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce7728a21d95c2e67918899131632b0.png)
![](https://img.xkw.com/dksih/QBM/2016/5/30/1572653876027392/1572653882204160/STEM/d1110d51ed5540d2b19ee9f25ac97448.png)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)设平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba9e20d667d04bf3ee7f55cc795ce01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ab55147ca5c0f958af43b0637ee31b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ce6a5f580bdd91e3eb4771ba843fa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
(3)在(1)的条件下,设平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a819c3421d087bd3eb2504b59812d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddd6f80993ce27b2619335e0d83bec57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐1】如图在直角梯形ABCD中,
,
,
,平面ABCD外有一点E,平面
平面ABCD,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/9c204bc9-64a9-4759-954a-56633902e8d0.png?resizew=198)
(1)求证:
;
(2)求点C到平面ABE的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c1b292baa30ffc34df3a47d57b60c0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2f39d3fcb1664705228e683c2cc3b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72fd2c0ce2cf4af2ebab61da7ebf0dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/302b34e451d5e5bf151609911f581217.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/9c204bc9-64a9-4759-954a-56633902e8d0.png?resizew=198)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5254da2da83b39b1496e61c3870b016c.png)
(2)求点C到平面ABE的距离.
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
【推荐2】如图,已知正方体
.
与
所成角的大小;
(2)若E,F分别为棱AB,AD的中点,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
(2)若E,F分别为棱AB,AD的中点,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49dde1a85749071c10183fe8ecf56ca.png)
您最近一年使用:0次