如图,边长为
的等边三角形
所在的平面垂直于矩形
所在的平面,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2019/1/9/2115133446840320/2115814078988288/STEM/af631afe390a4cb1acc3e78d4632b5b7.png?resizew=179)
(1)证明:
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1ac2e11788860424508ea9e80cf89d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2019/1/9/2115133446840320/2115814078988288/STEM/af631afe390a4cb1acc3e78d4632b5b7.png?resizew=179)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbcc91180cb7cc891f78dd3b1516e697.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faa23fa14f624ad8212bda55d321362f.png)
更新时间:2016-12-04 03:43:50
|
【知识点】 证明异面直线垂直
相似题推荐
解答题-证明题
|
较易
(0.85)
名校
【推荐1】如图,四边形
是等腰梯形,
,四边形
是矩形,
平面
,其中
分别是
的中点,
是
的中点.
![](https://img.xkw.com/dksih/QBM/2016/11/11/1573142612000768/1573142618300416/STEM/d40d3b32aaef4f9897e5cdbb4108dd33.png)
(1)求证:
平面
;
(2)
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75845d43ac1e32fb760ed15e38edea21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/398f834aceea15b09c942b05343ec8da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b927242223336dee4ae69314709172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bd6557072c6e3f2debbd1df5ef14ceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://img.xkw.com/dksih/QBM/2016/11/11/1573142612000768/1573142618300416/STEM/d40d3b32aaef4f9897e5cdbb4108dd33.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d46ae2beab3ae4c7dc414fc4951b1908.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c1f270df2479467e2c1e57ae58fddd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29f491a794b9ac1a85a18c87ecee616c.png)
您最近一年使用:0次
解答题-证明题
|
较易
(0.85)
【推荐2】在棱锥
中,
平面
平面
,
是
的中点,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25c8519d3bb9fb04e61c5dbf0829949b.png)
.![](https://img.xkw.com/dksih/QBM/2015/3/21/1572018779701248/1572018785550336/STEM/1bb79bbef452449b97147b54ba99f348.png)
(1)求证:
;
(2)求三棱锥
的高.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/648d3522c3b735dc050676fa95beb3c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72572599a90e302ec1325b31e680b967.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1dd54aec318a924050f9f89d260d70e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25c8519d3bb9fb04e61c5dbf0829949b.png)
.
![](https://img.xkw.com/dksih/QBM/2015/3/21/1572018779701248/1572018785550336/STEM/1bb79bbef452449b97147b54ba99f348.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00dc74e76fe3ebba1ec9eee864c9eb95.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d850ec6301e08305ab55016f27b6bea3.png)
您最近一年使用:0次