名校
1 . 在四棱锥
中,
为等边三角形,
,
,点
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/4c468772-4545-427d-80f7-0acc2356e067.png?resizew=198)
(1)求证:
平面
;
(2)已知平面
平面
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32450995497b9e341be832e9efad3114.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4ad161a2674d823247f0d8236cae1d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/4c468772-4545-427d-80f7-0acc2356e067.png?resizew=198)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7175df06e33cad4e6bbc3f2f6b0a2986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)已知平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04c222223dae9ef27d4c132534d9848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d5a2f5f4970ab8a1303523e23c8b24a.png)
您最近一年使用:0次
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5卷引用:江西省景德镇一中2022届高三10月月考数学(理)试题
解题方法
2 . 如图,正方体
的棱长为1,
,
分别是棱
的中点,过直线
的平面分别与棱
交于
,
两点,设
,以下说法中正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/9/24/2814913974853632/2817130742849536/STEM/2ee80581-6384-4af0-b0bb-362029ae75e4.png?resizew=260)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e86e3991200297ad172455e5ea93f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31be3b7305d6c181420ea7b28c420851.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/d87dccaf9f65ef67b126e9cf94bd8694.png)
![](https://img.xkw.com/dksih/QBM/2021/9/24/2814913974853632/2817130742849536/STEM/2ee80581-6384-4af0-b0bb-362029ae75e4.png?resizew=260)
A.平面![]() ![]() |
B.四边形![]() |
C.四边形![]() ![]() |
D.四棱锥![]() |
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2021-10-05更新
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3卷引用:湖北省黄冈市2021-2022学年高三上学期9月调研考试数学试题
湖北省黄冈市2021-2022学年高三上学期9月调研考试数学试题湖北省黄石市2021-2022学年高三上学期9月调研考试数学试题(已下线)第33讲 立体几何中的范围与最值问题-2022年新高考数学二轮专题突破精练
3 . 在棱长为2的正方体
中,点
,
,
,
分别为棱
,
,
,
的中点,若平面
平面
,且平面
与棱
,
,
分别交于点
,
,
,其中点
是棱
的中点,则三棱锥
的体积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a60be170a52db82cf37b30db0cde26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611f100dcfa7803db6eb233e2e7f2dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1859959fdb4c5edd8056893f94a10a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29383abc0620874c7c590cb94d05c5a1.png)
A.1 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
4 . 如图,三棱柱ABC-A1B1C1中,侧棱AA1⊥平面ABC,△ABC为等腰直角三角形,∠BAC=90°,且AB=AA1=2,E,F分别为CC1,BC的中点.
![](https://img.xkw.com/dksih/QBM/2021/8/1/2777024024166400/2821869803700224/STEM/1605a151-da7e-4e64-b794-21a560e3bde1.png)
(1)若D是AA1的中点,求证:BD∥平面AEF;
(2)若M是线段AE上的任意一点,求直线B1M与平面AEF所成角的正弦的最大值.
![](https://img.xkw.com/dksih/QBM/2021/8/1/2777024024166400/2821869803700224/STEM/1605a151-da7e-4e64-b794-21a560e3bde1.png)
(1)若D是AA1的中点,求证:BD∥平面AEF;
(2)若M是线段AE上的任意一点,求直线B1M与平面AEF所成角的正弦的最大值.
您最近一年使用:0次
2021-10-04更新
|
598次组卷
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4卷引用:安徽省亳州市第二中学2021-2022学年高二上学期第一次月考数学试题
安徽省亳州市第二中学2021-2022学年高二上学期第一次月考数学试题(已下线)第一章 空间向量与立体几何(本章复习提升)-2021-2022学年高二数学同步练习和分类专题教案(人教A版2019选择性必修第一册)山东省济宁市2017-2018学年度高三上学期期末考试 数学(理)试题人教A版(2019) 选择性必修第一册 过关斩将 第一章 空间向量与立体几何 本章复习提升
2021高二上·江苏·专题练习
名校
解题方法
5 . 在长方体
中,
,点
为棱
上靠近点
的三等分点,点
是长方形
内一动点(含边界),且直线
,
与平面
所成角的大小相等,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1baa492b87c78b80b9a58e24e67fc50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fc725182c2fd1413319fea35b95c7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
A.![]() ![]() |
B.三棱锥![]() |
C.存在点![]() ![]() |
D.线段![]() ![]() |
您最近一年使用:0次
2021-10-02更新
|
1474次组卷
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10卷引用:福建省龙岩市第一中学2022届高三上学期第三次半月考数学试题
福建省龙岩市第一中学2022届高三上学期第三次半月考数学试题湖南省永州市新田第一中学2021-2022学年高二上学期10月月考数学试题(已下线)专题03 立体几何中的动点问题和最值问题-【重难点突破】2021-2022学年高二数学上册常考题专练(人教A版2019选择性必修第一册)广东省佛山市高明区第一中学2022-2023学年高二上学期第二次大考(12月)数学试题重庆市青木关中学2020-2021学年高二上学期期中数学试题(已下线)模拟冲刺过关试卷03-【查漏补缺】2022年高考数学三轮冲刺过关(新高考专用)广东省华南师范大学附属中学2022-2023学年高二上学期期中数学试题广东省佛山市第一中学2022-2023学年高二上学期期中数学试题广东省高州中学2022-2023学年高二下学期期中数学试题重庆市清华中学校2023-2024学年高一下学期5月期中检测数学试题
名校
解题方法
6 . 如图所示的几何体中,
是菱形,
,
平面
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/fb3f00da-50a3-418b-9668-4af24be97dab.png?resizew=189)
(1)求证:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2addb6ef9ede5e234f4b363f5dc0e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57dfec4b826f33d0fd5e9664f52ae2fa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/fb3f00da-50a3-418b-9668-4af24be97dab.png?resizew=189)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30067b7b236d17af8a462f96a58d11bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b115316e0fcd2ef46a4dd383472996e4.png)
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2021-09-30更新
|
313次组卷
|
4卷引用:四川省成都市郫都区2021-2022高三上学期阶段性检测(一)文科数学试题
2022高三·河北·专题练习
名校
解题方法
7 . 已知四棱锥
如图所示,
,
,
,平面
平面
,点
为线段
的中点.
![](https://img.xkw.com/dksih/QBM/2021/9/29/2818542764204032/2819401981984768/STEM/a716b7178d1349b2a609e342b1516685.png?resizew=219)
(1)求证:
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ea5d7cfb1712e1aad407159c3fc6a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91ff67dbfe0050270169791ae85ef940.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18ce5e00b89a3cd9c39d45c13a0afed7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448cbac9a1ef3de7538a6b30cdc39582.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://img.xkw.com/dksih/QBM/2021/9/29/2818542764204032/2819401981984768/STEM/a716b7178d1349b2a609e342b1516685.png?resizew=219)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78172568aac9805d2ea2d5f742bf80c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9c9cfa597b444b5c9dbae7a825a695.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee4a6b8ef3e79b4482388c3391d8b18.png)
您最近一年使用:0次
2021-09-30更新
|
497次组卷
|
3卷引用:河南省中原名校2021-2022学年高二上学期12月联考理科数学试题
河南省中原名校2021-2022学年高二上学期12月联考理科数学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(理)试题(已下线)一轮复习大题专练48—立体几何(距离问题2)—2022届高三数学一轮复习
2022高三·江苏·专题练习
名校
8 . 已知平面
平面
是
外一点,过
点的两条直线
、
分别交
于
,交
于
,且
,则
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a60be170a52db82cf37b30db0cde26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaf27295b1f72b2cd75be4ff4c4db4be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16fb90a0397e542fd32debbd67d134d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
A.20 | B.16 | C.12 | D.4 |
您最近一年使用:0次
2021-09-26更新
|
427次组卷
|
4卷引用:山东省菏泽市东明县第一中学2021-2022学年高三上学期10月月考数学试题
山东省菏泽市东明县第一中学2021-2022学年高三上学期10月月考数学试题(已下线)“8+4+4”小题强化训练(35)直线、平面平行的判定与性质-2022届高考数学一轮复习(江苏等新高考地区专用)4.4.1 平面与平面平行的性质4.4.1 平面与平面平行
名校
解题方法
9 . 如图,三棱柱
中,侧棱垂直于底面,
,
,
,
为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/949fbf58-d821-4643-b5b5-b77433a187c4.png?resizew=146)
(Ⅰ)设平面
与直线
交于点
,求线段
的长;
(Ⅱ)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19c142b575f24964f25dac779e1422f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4339a40ae9d1947ec3a4b3e2fa3a16cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/8/949fbf58-d821-4643-b5b5-b77433a187c4.png?resizew=146)
(Ⅰ)设平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62871bb0dff211fc3bd80f9066c25b29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e47999eaa20cee553c86500f909556.png)
(Ⅱ)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62871bb0dff211fc3bd80f9066c25b29.png)
您最近一年使用:0次
2021-09-25更新
|
439次组卷
|
2卷引用:辽宁省抚顺市抚顺县高级中学校2021-2022学年高二上学期10月月考数学试题
名校
10 . 如图,已知
为正三角形,D为AB的中点,E在AC上,且
,现沿DE将
折起,折起过程中点A仍然记作点A,使得平面
平面BCED,在折起后的图形中.
![](https://img.xkw.com/dksih/QBM/2021/9/13/2807128439554048/2815225309601792/STEM/80d94deb-2f09-4c04-872f-88daac4f7a21.png?resizew=472)
(1)在AC上是否存在点M,使得直线
平面ABD.若存在,求出点M的位置;若不存在,说明理由.
(2)求平面ABD与平面ACE所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb8f6c9335373be2e09046a1e51424f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://img.xkw.com/dksih/QBM/2021/9/13/2807128439554048/2815225309601792/STEM/80d94deb-2f09-4c04-872f-88daac4f7a21.png?resizew=472)
(1)在AC上是否存在点M,使得直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6dfed58659a9cab4d1836c3d2effdc.png)
(2)求平面ABD与平面ACE所成锐二面角的余弦值.
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2021-09-24更新
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526次组卷
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2卷引用:安徽省宿州市砀山中学2021-2022学年高二上学期第一次质量检测数学试题