解题方法
1 . 如图所示的多面体由正四棱柱
与正四棱锥
组合而成,
与
交于点
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/4/ab47cdfa-2e1f-4f86-973e-a27f301f6ad7.png?resizew=149)
(1)证明:平面
平面
;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3015db5ca1f49bb7bad43657e06863ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84432a027e92c2350b4a6e57ce346740.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/4/ab47cdfa-2e1f-4f86-973e-a27f301f6ad7.png?resizew=149)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e90aa0d38c9b551591c18e4c86b44be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31be125048255c52e48bf5ec1160d082.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e226bcb5e8c165908dd5c9f803246ff.png)
您最近一年使用:0次
2023-05-03更新
|
371次组卷
|
2卷引用:海南省海口市海南省农垦实验中学等2校2023届高三一模数学试题
2023·全国·模拟预测
名校
2 . 如图,在几何体
中,四边形
是等腰梯形,四边形
是正方形,且平面
平面
,
,
,
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/51a8607c-f813-4542-a255-980b66e23460.png?resizew=122)
(1)证明:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb5a68a008a22d5a8cea5fe8dcf31e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5f58d0919b618868df14add12c59ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d28eb567698a9467890bfaebb49c248.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/3/51a8607c-f813-4542-a255-980b66e23460.png?resizew=122)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52bfb639ad02a425d8e67ab046088ff5.png)
您最近一年使用:0次
2023-05-01更新
|
467次组卷
|
3卷引用:2023年高三数学(理)押题卷三
3 . 如图,三棱柱
的侧面
是边长为1的正方形,侧面
侧面
,
,
,G是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/2/bbd2119b-9fdc-4e0e-aaed-f9247b6fa4ce.png?resizew=239)
(1)求证:平面
平面
;
(2)若P为线段BC的中点,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50d9bdbbdfabc737323692c796e41930.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9edc50f7febbc2d5d8dcdc23a3630a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c59c3fbf695b60c194cec3865e5d762d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/2/bbd2119b-9fdc-4e0e-aaed-f9247b6fa4ce.png?resizew=239)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce5e5a8d28b210b2b6ca2266a3745ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
(2)若P为线段BC的中点,求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4394ae713d375c35b591539143bcb849.png)
您最近一年使用:0次
2023-05-01更新
|
1116次组卷
|
4卷引用:陕西省咸阳市2023届高三三模文科数学试题
4 . 如图,多面体
中,
是平行四边形,
⊥平面
,
⊥
,
,
,
,点
在棱
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/27/0babbff0-b553-4b9e-859e-eae30ca65834.png?resizew=155)
(1)求证:
平面
;
(2)求二面角
的余弦值;
(3)若点
到平面
的距离为
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dad57c6594a3527e3f615a994934b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dd92fe3fef69971e192dcd23a02374b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db27b7f29d7d01b2692f217bc3079fc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075773e1b843a2f6c7edcecbf8e9a497.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9bd628837add19267c186fbff246076.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/27/0babbff0-b553-4b9e-859e-eae30ca65834.png?resizew=155)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9d32e76582bf550593fdef53e081225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/082a5fe72b478d8628b2f20d31fe7b6a.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9068f29d671d76d1e95ba3a4eaff5b96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
您最近一年使用:0次
5 . 阳马,中国古代算数中的一种几何形体,是底面为长方形,两个三角面与底面垂直的四棱锥体.如图,四棱锥P-ABCD就是阳马结构,PD⊥平面ABCD,且
,
,
.
平面
;
(2)若
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bec03e804f0cea1db5cde2aa185056a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27db558e8db4c957654c8e5cecd2d2dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67c4336d602211dbca2f1c5fc511f45c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae78e8bb0d1a42759b5464d23d63a601.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/877e0b42cc7f2add2521ba2d876af2e4.png)
您最近一年使用:0次
2023-04-13更新
|
1809次组卷
|
5卷引用:广西柳州高级中学、南宁市第三中学2023届高三联考数学(文)试题
广西柳州高级中学、南宁市第三中学2023届高三联考数学(文)试题第13章 立体几何初步(B卷·能力提升)-【单元测试】2022-2023学年高一数学分层训练AB卷(苏教版2019必修第二册)广东省肇庆市德庆县香山中学2022-2023学年高一下学期5月月考数学试题河南省许昌市鄢陵县职业教育中心(升学班)2022-2023学年高二下学期期中考试数学试题(已下线)第六章立体几何初步章末二十种常考题型归类(2)-【帮课堂】(北师大版2019必修第二册)
名校
6 . 如图,在四棱锥
中,底面
为直角梯形,
,
,
,
,
分别为棱
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/15/397a24e5-08d0-491c-bb6e-f961d0dc27e1.png?resizew=172)
(1)求证:平面
平面
;
(2)若平面
平面
,直线
与平面
所成的角为
,且
,求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151f7aef7d0f56e18562f5a4030cf815.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39e5680d463aa0e74316ec3db2359397.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/15/397a24e5-08d0-491c-bb6e-f961d0dc27e1.png?resizew=172)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/020e076f6f32758a022f98028498b268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b31fb036fa1bb4aa5edfd369f49b45b.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a3fd5284e160896f07ce367645fd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/627a50d77ab7386c33f49f1845c98c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d294d69caac577339f11f477b2047e.png)
您最近一年使用:0次
2023-04-13更新
|
2116次组卷
|
7卷引用:上海市长宁区2023届高三二模数学试题
上海市长宁区2023届高三二模数学试题(已下线)专题07 空间向量与立体几何(已下线)期末押题预测卷02(范围:高考全部内容)-【单元测试】2022-2023学年高二数学分层训练AB卷(人教B版2019)江苏省徐州市沛县2022-2023学年高一下学期第二次学情调研数学试题河南省周口市太康县2022-2023学年高一下学期期中数学试题第10章 空间直线与平面 单元综合检测(难点)-2023-2024学年高二数学同步精品课堂(沪教版2020必修第三册)上海市进才中学2023-2024学年高二上学期10月月考数学试题
解题方法
7 . 如图,在四棱锥
中,
为等边三角形,
为等腰三角形,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/11/49b639d4-43c7-4d00-881e-04b067cca695.png?resizew=170)
(1)求证:
平面
.
(2)若
底面
,且
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b0382c28547d3834ca71f3f0677695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/11/49b639d4-43c7-4d00-881e-04b067cca695.png?resizew=170)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7440b41636c761b0910639e310ff7dfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34ef71cc9f0c404443bf73911ab02d4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2023-04-10更新
|
1291次组卷
|
2卷引用:江西省100所名校最新模拟示范卷2023届高三全国统一考试数学(文)试题(四)
名校
8 . 如图,在三棱柱
中,D是
的中点,E是CD的中点,点F在
上,且
.
平面
;
(2)若
平面ABC,
,
,求平面DEF与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42a9b4db32c930bc04606ddc9f23bbc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2af2626608f61a4cfbb86494bd6df0e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f68454096da710903e9693c7f2015.png)
您最近一年使用:0次
2023-04-08更新
|
787次组卷
|
4卷引用:山东省聊城市2023届高三第三次学业质量联合检测数学试题
9 . 如图,在四棱锥中,平面
平面ABCD,
,
,
,
,
,
,
.
(1)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
(2)在线段PB上是否存在点M,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5865d488a9cf1181016fd2e866177cdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8180b12d96caf2e6b3ca28a474185e41.png)
您最近一年使用:0次
2023-04-01更新
|
830次组卷
|
4卷引用:陕西省安康中学2023届高三下学期3月质量检测文科数学试题
陕西省安康中学2023届高三下学期3月质量检测文科数学试题四川省仁寿县铧强中学2023届高三三模文科数学试题(已下线)专题06空间位置关系的判断与证明(已下线)专题06 立体几何 第一讲 立体几何中的证明问题(分层练)
名校
解题方法
10 . 如图所示的在多面体中,
,平面
平面
,平面
平面
,点
分别是
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/30/9edec392-47cf-4f57-bff3-eb7956c25941.png?resizew=185)
(1)证明:平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73153657848013d2a1c3247d7f84ddeb.png)
平面
;
(2)若
,求平面
和平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d55ec5203187112176740b5c2c6058.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39282bdf319f30d7bc261e2e3ab3b1e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cf33d73483c93f24cc6a1d76ef22ca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3919bf9dce67c9522d2f3878b69cac40.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/30/9edec392-47cf-4f57-bff3-eb7956c25941.png?resizew=185)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73153657848013d2a1c3247d7f84ddeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b986dcc94536991b5800d2dd6b3d68c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73153657848013d2a1c3247d7f84ddeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
您最近一年使用:0次
2023-03-30更新
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3755次组卷
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4卷引用:广东省部分学校2023届高三下学期3月模拟数学试题