名校
1 . 如图,在直四棱柱
中,底面
是边长为2的菱形,且
,
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/12/0456cc4d-780c-4ec0-aaa7-75fb15f18c6f.png?resizew=137)
(1)证明:
平面
;
(2)若
,求二面角
的余弦值.
![](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/e8d927585a17c2e98ef7d5a9589a26ac.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/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/12/0456cc4d-780c-4ec0-aaa7-75fb15f18c6f.png?resizew=137)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4cd2b33bd983a9ed6575b9de04a46a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f95ffa57b758ece1827087586090bf1.png)
您最近一年使用:0次
2021-04-17更新
|
1492次组卷
|
9卷引用:甘肃省2021届第二次高考诊断理科数学试题
甘肃省2021届第二次高考诊断理科数学试题甘肃省2021届高三下学期二模试数学(理科)试题内蒙古通辽新城第一中学2021届高三第二次增分训练数学(理)试题吉林省松原市实验高级中学2021届高三5月月考数学试题(已下线)专题2.7 空间向量与立体几何-2021年高考数学解答题挑战满分专项训练(新高考地区专用)河南省周口市太康县第二高级中学2022-2023学年高二上学期11月月考理科数学试题河南省周口市太康县第二高级中学2022-2023学年高二上学期11月月考文科数学试题黑龙江省七台河市勃利县高级中学2022-2023学年高一下学期期末数学试题重庆市杨家坪中学2022-2023学年高二上学期期末数学试题
名校
解题方法
2 . 如图,已知点
为正方形
所在平面外一点,
是边长为2的等边三角形,点
是线段
的中点,平面
平面
.
![](https://img.xkw.com/dksih/QBM/2021/3/23/2683899029176320/2683982750449664/STEM/2696a730-35a6-427f-b631-ff7de834c39f.png)
(1)证明:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2021/3/23/2683899029176320/2683982750449664/STEM/2696a730-35a6-427f-b631-ff7de834c39f.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa69a2247ad4d5231aa361349b12f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e2da608b66c9aee03e2503388ba4fd.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba759550d6c10ffd2922b936888f3973.png)
您最近一年使用:0次
2021-03-23更新
|
1404次组卷
|
6卷引用:甘肃省2021届高三第一次高考诊断文科数学试题
甘肃省2021届高三第一次高考诊断文科数学试题(已下线)13.4 立体几何初步综合练习-2020-2021学年高一数学同步课堂帮帮帮(苏教版2019必修第二册)江西省九江市第三中学2020-2021学年高二下学期期中考试数学(文)试题云南省昆明市官渡区云子中学长丰学校2020-2021学年高二上学期开学考试数学试题陕西省榆林市神木中学2021届高三下学期适应性考试文科数学试题陕西省渭南市临渭区2021届高三下学期三模文科数学试题
名校
解题方法
3 . 如图,在四棱锥
中,底面
是直角梯形,
,
,
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/2021/3/20/2682191649914880/2683364947492864/STEM/2a396c717a9e431aa035f6c8eb849f7b.png?resizew=179)
(1)证明:
平面
;
(2)若
,求三棱锥
的体积.
![](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/1d71e27e2818ed762c8e5bf4383d2272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fa9254b9703c6d3935ef8b3b8e36b85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2021/3/20/2682191649914880/2683364947492864/STEM/2a396c717a9e431aa035f6c8eb849f7b.png?resizew=179)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/201ab094c39e52f745dc43eaddcb1004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dded15635f3c87ba9857848839f809fd.png)
您最近一年使用:0次
2021-03-22更新
|
540次组卷
|
2卷引用:甘肃省武威第六中学2020-2021学年高三下学期第五次诊断考试数学(文)试题
4 . 在三棱锥
中,
是
的中点,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/74186bc3-da39-47e7-9ebf-8558e23da8f4.png?resizew=141)
(1)证明:
平面
;
(2)若
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08a9ec3b527947cad9caa4537e0cb7e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9978986377aae709a9da012e2782e9d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/74186bc3-da39-47e7-9ebf-8558e23da8f4.png?resizew=141)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f54161deed9fb6fa94318cd5a2efd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2021-03-21更新
|
796次组卷
|
3卷引用:甘肃省兰州市2020-2021学年高三下学期诊断试题数学(文科)试题
名校
解题方法
5 . 如图,在四棱锥
中,
平面
,四边形
是矩形,点
是
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/76dd7781-e687-4a1d-9803-abb4cabf6dfd.png?resizew=139)
(1)证明:
平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69c7dd958b8eade2414de5156f305234.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/76dd7781-e687-4a1d-9803-abb4cabf6dfd.png?resizew=139)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/373f735f0f04d11f1951eaef1bb78b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8ee3afb7e2c8943673449a1b136faf0.png)
您最近一年使用:0次
名校
解题方法
6 . 如图,在四棱锥
中,
平面
,四边形
是矩形,点
是
的中点,
.
![](https://img.xkw.com/dksih/QBM/2021/1/27/2645162923204608/2652402178940928/STEM/e3fe19ca-5fb3-477f-b1ae-713b4427cfdb.png?resizew=227)
(1)证明:
平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69c7dd958b8eade2414de5156f305234.png)
![](https://img.xkw.com/dksih/QBM/2021/1/27/2645162923204608/2652402178940928/STEM/e3fe19ca-5fb3-477f-b1ae-713b4427cfdb.png?resizew=227)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c2b786c64e6a9ed2ec5670cde74f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
您最近一年使用:0次
7 . 如图,在三棱锥
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6101853bc57c90c94ac553455a580710.png)
![](https://img.xkw.com/dksih/QBM/2021/1/25/2643909326340096/2645126644228096/STEM/9b2aad83-64f9-4769-8a7d-e53f52382314.png)
(1)证明:平面
平面
.
(2)在侧面
内求作一点H,使得
平面
,写出作法(无需证明),并求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6101853bc57c90c94ac553455a580710.png)
![](https://img.xkw.com/dksih/QBM/2021/1/25/2643909326340096/2645126644228096/STEM/9b2aad83-64f9-4769-8a7d-e53f52382314.png)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
(2)在侧面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39748bd3de9c56dfbe313e65645db6dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
您最近一年使用:0次
2021-01-27更新
|
697次组卷
|
6卷引用:甘肃省天水市甘谷县2021届高三一模数学(文科)试题
名校
解题方法
8 . 如图:四棱锥
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bfd8e393fa4365570c02261ccb7c9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44ad2b5c69085cb0cac709f775047430.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/16/f8b99986-debb-444a-93c0-f7707069df93.png?resizew=213)
(1)证明:
⊥平面
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bfd8e393fa4365570c02261ccb7c9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44ad2b5c69085cb0cac709f775047430.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/16/f8b99986-debb-444a-93c0-f7707069df93.png?resizew=213)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
您最近一年使用:0次
2022-06-14更新
|
1079次组卷
|
5卷引用:甘肃省武威市武威六中2020-2021学年高三第十次诊断考试数学(文)试题
甘肃省武威市武威六中2020-2021学年高三第十次诊断考试数学(文)试题云南省玉溪市民族中学2016-2017学年高二下学期第二次阶段考试数学(文)试题云南省玉溪市峨山彝族自治县第一中学2020-2021学年高二4月月考数学(文)试题(已下线)专题23 空间中的垂直关系(针对训练)-2023年高考数学一轮复习精讲精练宝典(新高考专用)云南省曲靖市会泽县实验高级中学校2022-2023学年高一下学期月考数学试题(四)
9 . 如图,在四棱锥PABCD中,PD⊥底面ABCD,AB∥CD,AB=2,CD=3,M为PC上一点,且PM=2MC.
![](https://img.xkw.com/dksih/QBM/2021/10/11/2827211932180480/2827935238881280/STEM/eda8120aa489443ba7f795d40c738f86.png?resizew=160)
(1)求证:BM∥平面PAD;
(2)若AD=2,PD=3,∠BAD=60°,求三棱锥PADM的体积.
![](https://img.xkw.com/dksih/QBM/2021/10/11/2827211932180480/2827935238881280/STEM/eda8120aa489443ba7f795d40c738f86.png?resizew=160)
(1)求证:BM∥平面PAD;
(2)若AD=2,PD=3,∠BAD=60°,求三棱锥PADM的体积.
您最近一年使用:0次
2021-10-12更新
|
3392次组卷
|
16卷引用:2019届甘肃省天水市第一中学高三下学期最后一模考前练数学(文)试题
2019届甘肃省天水市第一中学高三下学期最后一模考前练数学(文)试题辽宁省沈阳市2018届高三教学质量监测(一)数学文试题【全国百强校】河南省安阳市第一中学2018-2019学年高一上学期第二阶段考试数学试题人教A版(2019) 必修第二册 过关斩将 第八章 立体几何初步 本章复习提升人教B版(2019) 必修第四册 过关斩将 第十一章 立体几何初步 本章复习提升(已下线)全册综合测试模拟一-【新教材精创】2019-2020高一数学新教材知识讲学(人教A版必修第二册)-《高中新教材知识讲学》云南省玉溪第一中学2020-2021学年高二上学期期中考试数学(文)试题云南省玉溪第一中学2020-2021学年高二上学期期中考试数学(理)试题江西省上高二中2020-2021学年高二下学期第五次月考数学(文)试题北师大版 必修2 过关斩将 第一章 立体几何初步 本章复习提升四川省眉山市彭山区第一中学2021-2022学年高三上学期10月月考文科数学试题江西省六校2021-2022学年高二上学期期末联考数学(文)试题河南省八所名校2021-2022学年高二下学期第四次联考文科数学试题河南省豫西顶级名校2021-2022学年高二下学期4月联考文科数学试题广东省深圳市南方科技大学附属中学2022-2023学年高二下学期期中数学试题(已下线)模块四 专题5 暑期结束综合检测5(能力卷)
名校
解题方法
10 . 如图,在三棱柱
中,
、
、
分别是
、
、
的中点.
(1)证明:
平面
;
(2)若底面
是正三角形,
,
在底面的投影为
,求
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59b84f3419c645e18b738b5b54e0a908.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b17288da70b31823293794cb289e3123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34503a3cda0078be5e7e04047205039e.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee4c1ba0d8bec1f973ad42fc0715f386.png)
(2)若底面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1654f0789bb0af158a712fcdb8ca865.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f032bece4b7a786529eb903afb7205b8.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/d5326817f9af012432a202749d1df59f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04492d272769f773b06eb5f5e659fc9c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/96ebcef7-4b93-446a-8fff-9d9f2b0b69f0.png?resizew=178)
您最近一年使用:0次
2020-08-27更新
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387次组卷
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