1 . 如图,四面体
中,
是边长为1的正三角形,
是直角三角形,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/6af63c35-6ce4-4496-a163-0a90be8b6b13.png?resizew=184)
(1)证明:平面
平面
;
(2)若点
为
的中点,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f8f01137e92c0f2e63467036ae9cce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ecb138a844ef11bb3214cff0a475c9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f5fc4ad65b723b6a8da4c8dac154e6e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/6af63c35-6ce4-4496-a163-0a90be8b6b13.png?resizew=184)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17580410bf63dba4fe164265afaac4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
您最近一年使用:0次
2019-10-03更新
|
637次组卷
|
5卷引用:江西省抚州市临川一中2019-2020届高三上学期第一次联合考试 数学(文科)试题
江西省抚州市临川一中2019-2020届高三上学期第一次联合考试 数学(文科)试题2019年10月江西省临川第一中学高三上学期第一次联考数学(文)试题(已下线)专题8.5 直线、平面垂直的判定及其性质(讲)-浙江版《2020年高考一轮复习讲练测》福建省莆田第一中学2019-2020学年高三上学期期中考试数学(文)试题(已下线)专题8.5 直线、平面垂直的判定及性质(讲)-2021年新高考数学一轮复习讲练测
2 . 已知四棱锥
的底面为菱形,且
,
,
.
(1)求证:平面
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c753cb1eb73fd8d136d00462970797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05d82d07acbee5b207c7d053c422868f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fccf1cd8600af23d55876ab14e66e2d4.png)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bde1e200d1dd5ddc433c876c9d2f688c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e2da608b66c9aee03e2503388ba4fd.png)
![](https://img.xkw.com/dksih/QBM/2018/11/27/2084604227166208/2086722362679296/STEM/580eea9a321e4a219bb133b414c6b7fd.png?resizew=200)
您最近一年使用:0次
3 . 如图,四棱锥
中,平面
平面
,底面
为梯形,
,
,
,且
与
均为正三角形,
为
的重心.
![](https://img.xkw.com/dksih/QBM/2019/3/13/2159620014571520/2160200986836992/STEM/a7490d958fac45d5a7cee0628e3f7157.png?resizew=138)
(Ⅰ)求证:
平面
;
(Ⅱ)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/07ac6208289b7346c73cde72e01004d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d0d5f57a40474205aee752e23ec449d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e2903ff33266528a7902ad51cf8d75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5e1441a49e782ff0ef46e776cde06a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e2903ff33266528a7902ad51cf8d75.png)
![](https://img.xkw.com/dksih/QBM/2019/3/13/2159620014571520/2160200986836992/STEM/a7490d958fac45d5a7cee0628e3f7157.png?resizew=138)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf60ad9db3411f35704fa88d86bfef5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
(Ⅱ)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2017-05-21更新
|
1287次组卷
|
3卷引用:江西省抚州临川市第二中学2020届高三上学期10月月考数学(文)试题
4 . 如图,四棱柱
的底面
是菱形,
,
底面
,
.
![](https://img.xkw.com/dksih/QBM/2016/4/6/1572568078196736/1572568084013056/STEM/b11fec0fb8a04f5985123dc2069e72b2.png?resizew=353)
(1)证明:
平面
;
(2)若
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a23f01af749100e1888bba06268843db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e5981445b6f2a6c58974158d96a4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92105835f8075cb75dff244e908370b5.png)
![](https://img.xkw.com/dksih/QBM/2016/4/6/1572568078196736/1572568084013056/STEM/b11fec0fb8a04f5985123dc2069e72b2.png?resizew=353)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077bd9530ff11b780d01f8c87d6caa54.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6906f59d09ce31956d6f5ea2b23fc77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff7e524de0f5d99fbd82f58d28dd4219.png)
您最近一年使用:0次
2016-12-04更新
|
673次组卷
|
3卷引用:2015-2016学年江西省抚州市南城一中高二3月月考文科数学试卷