名校
1 . 如图 1,在直角梯形
中,
,且
.现以
为一边向外作正方形
,然后沿边
将正方形
翻折,使
平面与平面
垂直,
为
的中点,如图 2.
![](https://img.xkw.com/dksih/QBM/2018/1/19/1863926160793600/1865193617375232/STEM/ae413ed57ad34ab0b5fb8c7bb905086b.png?resizew=449)
(1)求证:
平面
;
(2)求证:
平面
;
(3)求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0465d52848d924b0576172c9b22a831.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0046177466c78f08d45449dc5639bf38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ecc1cb55a57dde481f8dd07ab150676.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://img.xkw.com/dksih/QBM/2018/1/19/1863926160793600/1865193617375232/STEM/ae413ed57ad34ab0b5fb8c7bb905086b.png?resizew=449)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac480d8d9d7821b62a603cf5cfda236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a814b70236a108be5d6e7ff271fe92.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a814b70236a108be5d6e7ff271fe92.png)
您最近一年使用:0次
2018-01-21更新
|
2295次组卷
|
6卷引用:广西陆川中学2017-2018学年高一上学期期末考试数学试题
解题方法
2 . 如图,在直三棱柱
中,
,
,
,
分别是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/ee48d601-34ab-4e9d-bde6-23f5aa0c63a9.png?resizew=156)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbfaf94af8e01d6d6a5c4273ed8076c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/025df2a9934b457cf20d91604e430612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2743e10dd8bce468d1d397b3e9a550d3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/ee48d601-34ab-4e9d-bde6-23f5aa0c63a9.png?resizew=156)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2730b513bd3359c3dfe6567e04f5ef9.png)
您最近一年使用:0次
2018-01-05更新
|
701次组卷
|
3卷引用:广西玉林市博白县2022届高三下学期热身训练数学(文)押题卷试题(二)
名校
3 . 如图,在空间几何体
中,平面
平面
,
与
都是边长为2的等边三角形,
,点
在平面
上的射影在
的平分线上,已知
和平面
所成角为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/ea97eb97-5c9e-4f08-bd87-c441197f1166.png?resizew=156)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17580410bf63dba4fe164265afaac4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cf468f5132e14ee1d8cc766808b11af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f8f01137e92c0f2e63467036ae9cce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417d8c68aac736fa56f7fc6f6c8a07cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60634341a9603e24b2bbc6960abe3d31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cf468f5132e14ee1d8cc766808b11af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/1/ea97eb97-5c9e-4f08-bd87-c441197f1166.png?resizew=156)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7caa95b00cb6c2d12b1b9eb666cc848d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/325fbf7c39864c58789bc8ebe853dbe9.png)
您最近一年使用:0次
2018-05-09更新
|
577次组卷
|
5卷引用:广西北流市实验中学2020届高三下学期开学考试数学(理)试题
4 . 如图,三棱柱
中,
平面
,
分别为
和
的中点,
是边长为2 的正三角形,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/4/cda4dd39-0a6c-49de-8ca1-53ef57fca7c1.png?resizew=209)
(1)证明:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77f8be504cdda71d9127e5d6869ac31e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/682cd9755e458cbe08f4b3fbe118f398.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/4/cda4dd39-0a6c-49de-8ca1-53ef57fca7c1.png?resizew=209)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0b39562ebcbac4476e41725a66bb4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f77f400a3cf0acb19d4e4c7da2b80a7.png)
您最近一年使用:0次
2017-12-11更新
|
421次组卷
|
2卷引用:广西玉林市、柳州市2017届高三4月联考数学(理)试题
5 . 如图,
是平行四边形,
平面
,
,
,
,
.
(1)求证:
平面
;
(2)求证:平面
平面
;
(3)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f95475bfc06e884754eb4a455c3f434e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb40aec3a0c136c9f18b9ce5983df73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9b5d2943803894bc5d204e75e2d172b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f04edd173055da613832b187737ce4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d31430a87a688a727b86e4001dcb3e6.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356f46276f25c78bab48c1f9447a2a78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8257b6bd25104e07b9ad935c0a3aac4.png)
(3)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdd5861601a5e5aaa35dc70b902fd381.png)
![](https://img.xkw.com/dksih/QBM/2017/4/17/1667603182772224/1667961547694080/STEM/ba8182d8-d3fa-4043-b146-405bc8344c48.png?resizew=255)
您最近一年使用:0次
2017-04-17更新
|
1489次组卷
|
3卷引用:广西玉林高中2017届高三高考预测五数学(文)试题
名校
解题方法
6 . 如图,在四棱锥
中,已知
,
,
底面
,且
,
,
为
的中点,
在
上,且
.
![](https://img.xkw.com/dksih/QBM/2017/3/7/1638703029534720/1640719368970240/STEM/73f8d69c-0d4a-4428-862c-d8d4f37ceb49.png?resizew=202)
(1)求证:平面
平面
;
(2)求证:
平面
;
(3)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02bd5cfe804460846423e77f72db10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c8da8430ae9b811b82527eb944cea18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c90a2e13488a5f4a2408718837fdabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb4564baf209de77802d46cda82995c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e7fa3aea72ccc36948a4a90f7368f71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dab8aacb7ddd4c8fac790d19a92689a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d260c4df7b0dc180af6980d21f3371.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cba5a44b94b99ed168bf7eef0a70c443.png)
![](https://img.xkw.com/dksih/QBM/2017/3/7/1638703029534720/1640719368970240/STEM/73f8d69c-0d4a-4428-862c-d8d4f37ceb49.png?resizew=202)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebbb79892c8cb8871a08437acc09bc80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dda09fb28b8f1e165715cca61d64f9c1.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd19c4db61254be8512edf741bf9f978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3520ee9cc97a075e889e1625dba1157c.png)
(3)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07652a9239c614f55564c2a29a46dd69.png)
您最近一年使用:0次
2017-03-10更新
|
1628次组卷
|
5卷引用:广西陆川县中学2018届高三开学考试数学(文)试题
7 . 如图,在三棱台
中,
平面
,
,
,
分别为
,
的中点
.![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/6/05b0716e-21a7-4b1f-8dbe-3266420fc207.png?resizew=240)
(1)求证:
平面
;
(2)若
且
,求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8bfe2553e852df73185d017c0a62fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/255791e63a0cf4f5e156319fae423769.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/6/05b0716e-21a7-4b1f-8dbe-3266420fc207.png?resizew=240)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1496afecd92a619fbe5e9b736f06f4e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae80f09dae8acbe1e5e27bd5c4d8164.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b0e6a4fae0cf7bf0e6bbd925318d3e.png)
您最近一年使用:0次
2017-02-08更新
|
1728次组卷
|
3卷引用:2017届广西玉林市、贵港市高三毕业班质量检测数学(理)试卷
8 . 如图,在三棱锥
中,平面
平面
,
为等边三角形,
且
,
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/2018/7/7/1983218060263424/1987447006707712/STEM/dd9a1459c6cf4582bed9ac4a722f1abe.png?resizew=147)
(1)求证:
平面
;
(2)求证:平面
平面
;
(3)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c0770c6d742b68640b49843bcfdcd59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eabdd3e13e1cac7abb2d6ebfcd3145ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a2cbcf1a679d701806db233b964e272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/431275773afb47dfa963ca864c5cd460.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae0edd54911bf873885f5b9b0887b7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fecdcc3fe7fe83e3ad38d3bc11cd7c63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f97e22c9dd88a2510de9e5a309191934.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d54cb2decd0d50d4031f7e7b7cb34fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d48ac31e4da45e6a4a1444ec08bab8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d6a2c7e0a0c95ec70991d928900cfe.png)
![](https://img.xkw.com/dksih/QBM/2018/7/7/1983218060263424/1987447006707712/STEM/dd9a1459c6cf4582bed9ac4a722f1abe.png?resizew=147)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7579330b41773f881a3e3418098c2201.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b0e5715477d779a1d572a5d426bb67f.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8739cf509cc7621560bcb7d5cdf42fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea16b6b8669fb096862d278ae62cdd3b.png)
(3)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c0770c6d742b68640b49843bcfdcd59.png)
您最近一年使用:0次
2016-12-03更新
|
4599次组卷
|
32卷引用:广西陆川县中学2017-2018学年高一下学期开学考试数学(理)试题
广西陆川县中学2017-2018学年高一下学期开学考试数学(理)试题广西陆川县中学2017-2018学年高一下学期开学考试(理) 数学试题2015年全国普通高等学校招生统一考试文科数学(北京卷)2015-2016学年宁夏银川一中高一上学期期末考试数学试卷2015-2016学年河北省冀州市中学高一下开学考试数学试卷2015-2016学年河南省南阳市高一上学期期末数学试卷2015-2016学年新疆石河子二中高二上学期期末数学试卷2015-2016内蒙古杭锦后旗奋斗中学高一下期末数学试卷2016-2017学年山东陵县一中高二理12月月考数学试卷2016-2017学年山东陵县一中高二文12月月考数学试卷2016-2017学年湖南省益阳市高一上学期期末考试数学试卷2016-2017学年山东省德州市高二上学期期末检测数学(文)试卷甘肃省高台县第一中学2016-2017学年高二下学期期末考试数学(文)试题云南民族大学附属中学2017-2018学年高二12月月考数学(文)试题河北省武邑中学2017-2018学年高一上学期第三次月考数学试题河南省商丘市九校2017-2018学年高一上学期期末联考数学试题辽宁省营口中学2017-2018学年高一数学上学期期末考试试题2018届高考数学高考复习指导大二轮专题复习:专题五 立体几何 测试题5河北省邯郸市永年区第二中学2017-2018学年高二下学期期末考试数学(文)试题【全国百强校】湖北省襄阳市第四中学2016-2017学年高二数学(理)测试题(十)试题辽宁省营口市2017-2018学年高一4月月考数学试题【校级联考】广东省汕头市达濠华侨中学,东厦中学2019届高三上学期第二次联考数学(文)试题【校级联考】甘肃省通渭县2017-2018学年高一上学期期末考试数学试题安徽省六安市霍邱县第一中学2018-2019学年高二上学期期中考试数学(文)试题人教A版 全能练习 必修2 模块结业测评(一)河北省唐山市遵化市2019-2020学年高二上学期期中数学试题辽宁省铁岭市六校协作体2019-2020学年高三11月月考数学(文)试题人教A版(2019) 必修第二册 逆袭之路 第八章 立体几何初步 本章整合提升人教B版(2019) 必修第四册 逆袭之路 第十一章 立体几何初步 本章整合提升广西柳州市二中2018-2019学年高一下学期第一次月考数学试题北京十年真题专题07立体几何与空间向量专题08立体几何与空间向量(第一部分)