名校
解题方法
1 . 一副标准的三角板(如图1)中,∠ABC为直角,∠A=60°,∠DEF为直角,DE=EF,BC=DF,把BC与DF重合,拼成一个三棱锥(如图2).设M是AC的中点,N是BC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/f8af2a6a-6289-4609-8e98-6bedb4aff1c8.png?resizew=298)
(1)求证:平面ABC⊥平面EMN;
(2)设平面ABE∩平面MNE=l,求证:l∥AB.
(3)若AC=4,且二面角E-BC-A为直二面角,求直线EM与平面ABE所成角的正弦值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/f8af2a6a-6289-4609-8e98-6bedb4aff1c8.png?resizew=298)
(1)求证:平面ABC⊥平面EMN;
(2)设平面ABE∩平面MNE=l,求证:l∥AB.
(3)若AC=4,且二面角E-BC-A为直二面角,求直线EM与平面ABE所成角的正弦值.
您最近一年使用:0次
2020-11-28更新
|
593次组卷
|
3卷引用:江苏省南京航空航天大学附属高级中学2021届高三上学期期中三校联考数学试题
江苏省南京航空航天大学附属高级中学2021届高三上学期期中三校联考数学试题北师大版(2019) 选修第一册 必杀技 第三章 §4 综合训练(已下线)专题1.10 空间向量的应用-重难点题型检测-2021-2022学年高二数学举一反三系列(人教A版2019选择性必修第一册)
名校
解题方法
2 . 如图,在三棱柱ABC-A1B1C1中,
为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/be12cd0d-b264-49de-a009-b1bb520b7b3e.png?resizew=154)
(1)若此三棱柱为正三棱柱,且
,求异面直线
与
所成角的大小;
(2)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/be12cd0d-b264-49de-a009-b1bb520b7b3e.png?resizew=154)
(1)若此三棱柱为正三棱柱,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4991ea372d13c03461e8b2a8808ef91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e04f01e371223cdae8da2466686b560.png)
您最近一年使用:0次
2021-02-02更新
|
1452次组卷
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2卷引用:湖北省随州市第一中学2020-2021学年高一下学期期中数学试题
名校
3 . 如图,在正方体
中,点E、F分别为是
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/4a9a441d-14a3-4f39-b032-8ec4de72761d.png?resizew=162)
(1)证明:
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64265fe16d0d3eadd213f2d6529e07fa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/14/4a9a441d-14a3-4f39-b032-8ec4de72761d.png?resizew=162)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b7903de4be7d5dc1175cfbf6e8da9f.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/349740b9aa8c242258eb07cb7224c3f6.png)
您最近一年使用:0次
19-20高一·浙江杭州·期末
名校
4 . 如图,正三棱柱
的底面边长为2,高为
,过
的截面与上底面交于
,且点
在棱
上,点
在棱
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/18/c5467134-d2a6-4544-a5b1-c78f9dcbd76e.png?resizew=206)
(Ⅰ)证明:
;
(Ⅱ)当点
为棱
的中点时,求四棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/18/c5467134-d2a6-4544-a5b1-c78f9dcbd76e.png?resizew=206)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bedf343529e631edbd092670bb2b37d7.png)
(Ⅱ)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858f284c387da8f005621953a381462b.png)
您最近一年使用:0次
名校
解题方法
5 . 如图,边长为
的等边
所在平面与菱形
所在平面互相垂直,且
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/10/915d88ac-80df-46d6-ae7f-523fec1081d4.png?resizew=216)
(1)求证:
平面
;
(2)求多面体
的体积
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e53b212640dadf751ef7f65a78a209.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1433137fef4e88aa38f2503cec900358.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7579755d7d17bd72d97b03df323aefa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e302e173e60f3e6136369d0c4908d5ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/10/915d88ac-80df-46d6-ae7f-523fec1081d4.png?resizew=216)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3521d6f223a2d7f597f8613c4530dd1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求多面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
您最近一年使用:0次
2020-08-27更新
|
796次组卷
|
14卷引用:湖南省长沙市宁乡市三校(宁乡七中、九中、十中)2021-2022学年高一下学期期中数学试题
湖南省长沙市宁乡市三校(宁乡七中、九中、十中)2021-2022学年高一下学期期中数学试题安徽省合肥市2020届高三高考数学(文科)三模试题(已下线)专题20+立体几何综合-2020年高考数学(文)母题题源解密(全国Ⅱ专版)安徽省合肥市2020届高三下学期第三次教学质量检测数学(文)试题陕西省宝鸡市渭滨区2021届高三下学期适应性训练(一)文科数学试题黑龙江省实验中学2021届高三下学期四模数学(文)试题陕西省西安中学2021届高三下学期第八次模拟考试文科数学试题四川省仁寿第一中学校南校区2020-2021学年高二5月第二次质量检测数学(文)试题陕西省安康中学2021-2022学年高二上学期第一次月考数学试题(已下线)专题8-5 立体几何大题15种归类(平行、垂直、体积、动点、最值等非建系)-2022年高考数学毕业班二轮热点题型归纳与变式演练(全国通用)河南省中原名校联盟2021-2022学年高三下学期4月适应性联考文科数学试题(已下线)专题20 立体几何综合-2020年高考数学(文)母题题源解密(全国Ⅱ专版)宁夏银川市第二中学2023届高三模拟数学(文)试题四川省泸州市泸县第四中学2024届高三下学期开学考试数学(文)试题
名校
6 . 如图所示,在四棱锥
中,底面四边形
是菱形,底面
是边长为2的等边三角形,PB=PD=
,AP=4AF
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/a93bb600-1ac6-48dc-b699-8a170222ee71.png?resizew=209)
(1)求证:PO⊥底面ABCD
(2)求直线
与OF所成角的大小.
(3)在线段
上是否存在点
,使得
平面
?如果存在,求
的值;如果不存在,请说明理由.
![](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/1fa0c1a6e9990d435f5df2cba32cc203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35361e76a7c85d1886728c8d0200b234.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/a93bb600-1ac6-48dc-b699-8a170222ee71.png?resizew=209)
(1)求证:PO⊥底面ABCD
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
(3)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5865d488a9cf1181016fd2e866177cdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ae8768996ca9a0f2c5d9a19abbd54df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8180b12d96caf2e6b3ca28a474185e41.png)
您最近一年使用:0次
2020-12-05更新
|
2361次组卷
|
11卷引用:四川省遂宁市安居区2020-2021学年高二上学期期中考试数学(文)试题
四川省遂宁市安居区2020-2021学年高二上学期期中考试数学(文)试题四川省遂宁中学校2021-2022学年高二上学期期中考试数学(文)试题上海市南洋模范中学2022-2023学年高二上学期期中数学试题四川省巴中市恩阳区2022-2023学年高二上学期期中数学试题(已下线)期中测试卷01(测试范围:第10-11章)-2023-2024学年高二数学单元速记·巧练(沪教版2020必修第三册)江西省南昌市豫章中学2021-2022学年高二入学调研(B)数学(理)试题新疆新源县2020-2021学年高一下学期期末联考数学试题四川省遂宁市射洪中学2021-2022学年高二上学期第一次月考数学理试题河南省温县第一高级中学2021-2022学年高二上学期12月月考文科数学试题上海市向明中学2022-2023学年高二上学期10月月考数学试题新疆哈密市第八中学2021-2022学年高二上学期期末数学(理)试题
名校
7 . 如图,在四棱锥
中,底面
是菱形,
是线段
上一点(不含
,
),在平面
内过点
作
平面
交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/3022e973-ed12-4977-b120-3619f30185a4.png?resizew=199)
(Ⅰ)写出作
的步骤(不要求证明);
(Ⅱ)若
,
,
是
的中点,求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67a1822040c893d9c4961acc810afe02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1651b87ec052cefebae47d1e589c5146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21665d21bbfb04410c78345de1fd15ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/defa5b53043ae802bb1af7d14374406d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/3022e973-ed12-4977-b120-3619f30185a4.png?resizew=199)
(Ⅰ)写出作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5634a208294350f8ec151cd19b6d3278.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb8fb552b9e21dbaba74d11aa747790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/692168695aa4666d9e262a6f71e9254a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/defa5b53043ae802bb1af7d14374406d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21665d21bbfb04410c78345de1fd15ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67a1822040c893d9c4961acc810afe02.png)
您最近一年使用:0次
2020-12-04更新
|
579次组卷
|
4卷引用:江西省峡江中学2021-2022学年高二11月期中考试数学(理)试题
江西省峡江中学2021-2022学年高二11月期中考试数学(理)试题四川省泸州市2021届高三第一次诊断性考试理科数学(一模)试题(已下线)理科数学-学科网2021年高三5月大联考考后强化卷(新课标Ⅰ卷)四川省泸县第四中学2023-2024学年高三上学期10月月考数学(理)试题
名校
解题方法
8 . 如图,四边形
与
均为菱形,
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/5865decd-e504-4687-809e-197f7fba2f3f.png?resizew=200)
(1)求证:平面
平面
;
(2)求证:
平面
;
(3)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f84f169e50dc59d4f7a8e1e36f5c847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6da20f949db06cbc10f052a7f8466019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1f944d655ba3e2325d5a95a01e6ff85.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/5865decd-e504-4687-809e-197f7fba2f3f.png?resizew=200)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42ce82a4c37365f2d4dea2c4ad2e3288.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/111da2c687a67fd089c365090908eb00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2194add18a7df1a23cf1554dc2da1b40.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed7a8116d2f02b52c33fb7a49fc0d1ae.png)
您最近一年使用:0次
2020-12-02更新
|
1095次组卷
|
3卷引用:黑龙江省哈尔滨师范大学附属中学2020-2021学年高三上学期期中考试数学(理)试题
2020高二·浙江·专题练习
名校
解题方法
9 . 如图,在四棱锥PABCD的底面ABCD中,BC∥AD,且AD=2BC,O,E分别为AD,PD的中点.
![](https://img.xkw.com/dksih/QBM/2020/11/6/2587376243875840/2588012559622144/STEM/fe1f63092de34c718bba9b3546f8fb60.png?resizew=124)
(1)设平面PAB∩平面PCD=l,请作图确定l的位置并说明你的理由;
(2)若Q为直线CE上任意一点,证明:OQ∥平面PAB.
![](https://img.xkw.com/dksih/QBM/2020/11/6/2587376243875840/2588012559622144/STEM/fe1f63092de34c718bba9b3546f8fb60.png?resizew=124)
(1)设平面PAB∩平面PCD=l,请作图确定l的位置并说明你的理由;
(2)若Q为直线CE上任意一点,证明:OQ∥平面PAB.
您最近一年使用:0次
2020-11-07更新
|
400次组卷
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8卷引用:浙江省杭州市学军中学(西溪校区)2019-2020学年高二上学期期中数学试题
浙江省杭州市学军中学(西溪校区)2019-2020学年高二上学期期中数学试题(已下线)【新东方】杭州高二数学试卷232浙江省台州市洪家中学2020-2021学年高二上学期第一次阶段考试数学试题(已下线)专题8.3 直线、平面平行的判定与性质-2021年高考数学(理)一轮复习-题型全归纳与高效训练突破(已下线)专题8.3 直线、平面平行的判定与性质-2021年高考数学(文)一轮复习-题型全归纳与高效训练突破(已下线)专题8.4 直线、平面平行的判定及性质(精练)-2021年高考数学(理)一轮复习讲练测(已下线)专题8.4 直线、平面平行的判定及性质 (精练)-2021年高考数学(文)一轮复习学与练(已下线)专题8.4 直线、平面平行的判定及性质(精练)-2021年高考数学(理)一轮复习学与练
10 . 如图所示的几何体
中,四边形
为菱形,
,
平面
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/cd3b0d13-2109-48f9-af87-e26165784081.png?resizew=160)
(1)求证:
平面
;
(2)若
,
,求直线
与平面
所成角的正弦值.
![](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/c8139d9fd5c670c91aa7dc485366dd1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a22d6b860f06fe23618b0d3de6768fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/224efa375375f1ac848b0c15ee51aebd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/cd3b0d13-2109-48f9-af87-e26165784081.png?resizew=160)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8ccd4181f956f6e0140bf0ab8f0716.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97cf714ffb3fd5917a76b191640b55fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b481bc1513732edfccc85cca77096e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
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