1 . 如图所示,梯形
中,
,平面
平面
,且四边形
为矩形,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/6/18/2487460573790208/2488060332752896/STEM/e08a17b2-4f6e-4c33-973f-d1a15440c23e.png)
(1)求证:
平面
;
(2)求点
到平面
的距离.
![](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/fb5a68a008a22d5a8cea5fe8dcf31e10.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/b7ea9d92e5c258a50af1e461c7388894.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0524c3287106a4460858ed3926989a4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af32ecdc0dc2f1a60b47f3311a0587d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71aa812f83d86aaf308244a9afc09322.png)
![](https://img.xkw.com/dksih/QBM/2020/6/18/2487460573790208/2488060332752896/STEM/e08a17b2-4f6e-4c33-973f-d1a15440c23e.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
您最近一年使用:0次
2020-06-19更新
|
995次组卷
|
5卷引用:2020届广东省珠海市高三三模数学(文)试题
2 . 如图,在直四棱柱ABCD﹣A1B1C1D1中,底面ABCD为菱形,∠ABC=60°,AA1
AB,M,N分别为AB,AA1的中点.
![](https://img.xkw.com/dksih/QBM/2020/6/14/2484376738807808/2485821042515968/STEM/f1dcefc6-423b-4155-9c1a-65455152da68.png)
(1)求证:平面B1NC⊥平面CMN;
(2)若AB=2,求点N到平面B1MC的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ae65bdb69940a67a18d56ff02060b22.png)
![](https://img.xkw.com/dksih/QBM/2020/6/14/2484376738807808/2485821042515968/STEM/f1dcefc6-423b-4155-9c1a-65455152da68.png)
(1)求证:平面B1NC⊥平面CMN;
(2)若AB=2,求点N到平面B1MC的距离.
您最近一年使用:0次
2020-06-16更新
|
666次组卷
|
2卷引用:广东省深圳市2020届高三下学期第二次调研数学(文)试题
3 . 如图
中,
,
,
、
分别是
、
的中点,将
沿
折起连结
、
,得到多面体
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/fb92d19a-55eb-40ed-83ba-fd62541bca57.png?resizew=187)
(1)证明:在多面体
中,
;
(2)在多面体
中,当
时,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b70cb8fa2705eefbfdac611e7c8cce9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4918cecca87d8cec3d9df6153122fe2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1e3a43d0fa18f6c0888ba804d5b329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/fb92d19a-55eb-40ed-83ba-fd62541bca57.png?resizew=187)
(1)证明:在多面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1e3a43d0fa18f6c0888ba804d5b329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90197a948331e61db644266368017e3.png)
(2)在多面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1e3a43d0fa18f6c0888ba804d5b329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c85aeab3aeaf4367b711da8cde2e8bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78d07f36efcb9d203267d7c0409720cf.png)
您最近一年使用:0次
解题方法
4 . 如图,在三棱柱
中,侧面
为菱形,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/fb8ff15d-e53e-42c5-9b45-1938ea516c3e.png?resizew=259)
(1)求证:
;
(2)若
,
,三棱锥
的体积为
,且点
在侧面
上的投影为点
,求三棱锥
的表面积.
![](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/c69ae4a6ff8c569922d221a041c8f35d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180ddcf43a796a7cac8d276ba34b836c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/fb8ff15d-e53e-42c5-9b45-1938ea516c3e.png?resizew=259)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8db87b41df9d3c83d2810a4265d768d3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ce9b2d145c043730a7bc400b1eb726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aab8cba157598642cb6b42734861a184.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aab8cba157598642cb6b42734861a184.png)
您最近一年使用:0次
2020-06-12更新
|
515次组卷
|
2卷引用:2020届广东省广州市高三二模文科数学试题
名校
5 . 在四棱锥
中,
,
,
平面ABCD,E为PD的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/e19e64be-3887-4e6c-b034-c49ddfdb43c2.png?resizew=171)
(1)求四棱锥
的体积V;
(2)若F为PC的中点,求证:平面
平面AEF;
(3)求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37444a4da006d26dd252bee7c6cecf01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6853d227df9b14f4cbd5560f913e54a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f5019d74a9497f861a0f755ea31d010.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/e19e64be-3887-4e6c-b034-c49ddfdb43c2.png?resizew=171)
(1)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
(2)若F为PC的中点,求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f4096ff62b4f29932cd8c6eef661a3.png)
您最近一年使用:0次
2020-06-09更新
|
587次组卷
|
3卷引用:2020届广东省深圳市福田中学高三质量监测数学(理)试题
名校
解题方法
6 . 如图1,在平行四边形
中,
,
,
,
为边
的中点,以
为折痕将
折起,使点
到达
的位置,得到图2几何体
.
![](https://img.xkw.com/dksih/QBM/2020/6/5/2478243948118016/2480229428822016/STEM/72402f9e5f2e4964bc7ad19d3990420b.png?resizew=368)
(1)证明:
;
(2)当
平面
时,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c4cb73e9d976cbfe9c590044fa69dd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9e4694629f7c01980a0e13c89bb6871.png)
![](https://img.xkw.com/dksih/QBM/2020/6/5/2478243948118016/2480229428822016/STEM/72402f9e5f2e4964bc7ad19d3990420b.png?resizew=368)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28a844f09647c16b3bc9bf1fe7f2c27b.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4739ad948445af72d585fe29c745929b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c10c16d2d9d22c4b34ddd965e26aa0d7.png)
您最近一年使用:0次
2020-06-08更新
|
794次组卷
|
6卷引用:2020届广东省茂名市高三第二次综合测试数学(文)试题
7 . 如图,在四棱锥
中,底面
是平行四边形,
,
,
,设平面
平面
.
![](https://img.xkw.com/dksih/QBM/2020/5/30/2473917949820928/2474092844662784/STEM/5e964fafb3c247108e1f6bb50e614293.png?resizew=297)
(1)证明:
;
(2)若平面
平面
,求四棱锥
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/77ed43f2f675b202cd975f8d8a1e28cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1738e419e260a403f33c3f6c74c6d41d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb37aafadd6fcfac81dba37b6f45fabb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1084a42a7b7600ac9651a023de6d3401.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebae74545340ce6971f437d129e9c659.png)
![](https://img.xkw.com/dksih/QBM/2020/5/30/2473917949820928/2474092844662784/STEM/5e964fafb3c247108e1f6bb50e614293.png?resizew=297)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d620f242099d9e5e3225115c80d9bfa.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
您最近一年使用:0次
2020-05-30更新
|
312次组卷
|
3卷引用:2020届广东省佛山市高三教学质量检测(二模)数学(文)试题
2020届广东省佛山市高三教学质量检测(二模)数学(文)试题(已下线)考点24 空间直线、平面的平行、垂直问题-2021年新高考数学一轮复习考点扫描四川省成都华西中学2020-2021学年高三上学期期中数学(文)试题
8 . 如图,已知正三棱柱
,
是
的中点,
是
的中点,且
,
.
![](https://img.xkw.com/dksih/QBM/2020/5/19/2466047907725312/2466950827597824/STEM/cc97191a5c6247519478c5fce1d4af29.png?resizew=151)
(1)证明:
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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53e97fcdcfd6183b976a61ef3222c607.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://img.xkw.com/dksih/QBM/2020/5/19/2466047907725312/2466950827597824/STEM/cc97191a5c6247519478c5fce1d4af29.png?resizew=151)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6785c7c85a503531649f9c9b4cbfcf04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/641d9688e81760c02d0dfc4ba015afb1.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
您最近一年使用:0次
名校
9 . 动圆
与
轴交于
,
两点,且
是方程
的两根.
(1)若线段
是动圆
的直径,求动圆
的方程;
(2)证明:当动圆
过点
时,动圆
在
轴上截得弦长为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98ec3d75e53b990bc8f9a4622928dd21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27b583230a32b774445332490c511989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5ea5b7512d21716f87616936d5aa996.png)
(1)若线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)证明:当动圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b0fc22034c9db29b23c4cf9faf5af6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
您最近一年使用:0次
2020-05-20更新
|
593次组卷
|
9卷引用:2020届广东省高三普通高中招生全国统一考试模拟(一)数学(文)试题
2020届广东省高三普通高中招生全国统一考试模拟(一)数学(文)试题福建省厦门第一中学2020-2021学年高二分班摸底练习数学试题内蒙古通辽实验中学2020-2021学年高一上学期自主检测数学理科试题苏教版(2019) 选修第一册 突围者 第2章 专项拓展训练2 与圆有关的定点、定值、探索性问题山东省日照第一中学2021-2022学年高二上学期第一次月考数学试题(已下线)专题2.17 直线和圆的方程大题专项训练(30道)-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)(已下线)专题09 与圆有关的定值问题-【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)福建省厦门第一中学2020-2021学年高二上学期摸底考试数学试题(已下线)2.3 圆与圆的位置关系-高二数学同步精品课堂(苏教版2019选择性必修第一册)