名校
解题方法
1 . 如图,在三棱锥
中,
.
为
的中点,
为
上一点,且
平面
.
求证:(1)直线
平面
;
(2)平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb1d443ec8f00026186cc7a1b279b70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32dbd3bb09a8c8709746799aed9c721c.png)
求证:(1)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307807ee10071bafbe922eb18d2517d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ce50ba5e349425274f05d46d120a74.png)
(2)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22ce50ba5e349425274f05d46d120a74.png)
![](https://img.xkw.com/dksih/QBM/2017/12/8/1834272571637760/1836159105826816/STEM/105a7bdb118e467da52acd7e36f56200.png?resizew=122)
您最近一年使用:0次
2017-12-11更新
|
669次组卷
|
2卷引用:江苏省溧阳市2017-2018学年高三第一学期阶段性调研测试数学(文)试题
2 . 已知圆
过
三点,圆
.
(1)求圆
的方程;
(2)如果圆
和圆
相外切,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19bc91b73d3662b8f41266bf0f7d634a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23dd04e26b82e76f153872a6190d7130.png)
(1)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)如果圆
![](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/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解题方法
3 . 如图,在四棱柱
中,底面
为等腰梯形,
为边
的中点,
底面
.
(1)求证:
平面
;
(2)平面
平面
.
![](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/1064b4963665d2ff9c7dafc019d478a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd5a799ad56ad0668ada34b61ab4244.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afabf56cc68ea438a890f9fea04b708e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9b7b7793d29d66dfdd89e7a6564a35c.png)
(2)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d8a4efd44285470cc2860876cb521e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13cfdc6224181d44e63aab43ddaf07ef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/3/9d36543d-1749-4353-b250-4438d40ede46.png?resizew=181)
您最近一年使用:0次
2017-12-06更新
|
682次组卷
|
3卷引用:江苏省无锡市普通高中2018届高三上学期期中基础性检测考数学试题
4 . 如图,在直三棱柱ABC-A1B1C1中,D为棱BC上一点.
![](https://img.xkw.com/dksih/QBM/2016/5/20/1572643402964992/1572643408707584/STEM/3cb5d56911ad45a8892aab067ac17bb0.png?resizew=182)
(1)若AB=AC,D为棱BC的中点,求证:平面ADC1⊥平面BCC1B1;
(2)若A1B∥平面ADC1,求
的值.
![](https://img.xkw.com/dksih/QBM/2016/5/20/1572643402964992/1572643408707584/STEM/3cb5d56911ad45a8892aab067ac17bb0.png?resizew=182)
(1)若AB=AC,D为棱BC的中点,求证:平面ADC1⊥平面BCC1B1;
(2)若A1B∥平面ADC1,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/501dc6babe43bd4d7e669b5dcea40945.png)
您最近一年使用:0次
2016-12-04更新
|
978次组卷
|
4卷引用:江苏省南通中学2018届高三10月月考数学试题
江苏省南通中学2018届高三10月月考数学试题2016届江苏省南京市高三第三次模拟考试数学试卷(已下线)专题07 空间几何体的平行于垂直-《巅峰冲刺2020年高考之二轮专项提升》(江苏)福建省福州市八县(市)协作校2021-2022学年高一下学期期末联考数学试题
名校
5 . 如图,在四棱锥
中,底面
是菱形,且
.
![](https://img.xkw.com/dksih/QBM/2015/3/12/1572002372861952/1572002378866688/STEM/f0d8031b426e486c9c2acb5745ca9456.png)
(1)求证:
;
(2)若平面
与平面
的交线为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6153163fecdf3f410411048428ccaef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d0710321d97361e5782124bbf7f0c9.png)
![](https://img.xkw.com/dksih/QBM/2015/3/12/1572002372861952/1572002378866688/STEM/f0d8031b426e486c9c2acb5745ca9456.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8606472edf34185e67ab493af7e06f32.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c70a73fc2e59b8bdf802b0072243ab0.png)
您最近一年使用:0次
2016-12-03更新
|
893次组卷
|
12卷引用:江苏省仪征中学2017届高三下学期期初测试数学试题
江苏省仪征中学2017届高三下学期期初测试数学试题2015届江苏省淮安市高三数学第一次调研测试理科数学试卷2015届江苏省淮安市高三数学第一次调研测试文科数学试卷2015届江苏省宿迁市高三上学期第一次摸底考试数学试卷2015届江苏省盐城市时杨中学高三1月调研理科数学试卷2015届江苏省盐城市时杨中学高三1月调研文科数学试卷2015届江苏省宿迁市高三上学期第一次摸底考试理科数学试卷2015届江苏省宿迁市高三上学期第一次摸底考试文科数学试卷江苏省常州市溧阳市2019-2020学年高三上学期期中数学(文)试题(已下线)13.2 基本图形位置关系-2020-2021学年高一数学同步课堂帮帮帮(苏教版2019必修第二册)/13.2 基本图形位置关系-2020-2021学年高一数学同步课堂帮帮帮(苏教版2019必修第二册)云南省梁河县第一中学2020-2021学年高一下学期期中考试数学试题 新疆乌鲁木齐市第三十一中学2020-2021学年高一下学期第一次月考数学试题
名校
6 . 如图所示,
是两个垃圾中转站,
在
的正东方向
千米处,
的南面为居民生活区. 为了妥善处理生活垃圾,政府决定在
的北面建一个垃圾发电厂
. 垃圾发电厂
的选址拟满足以下两个要求(
可看成三个点):①垃圾发电厂到两个垃圾中转站的距离与它们每天集中的生活垃圾量成反比,比例系数相同;②垃圾发电厂应尽量远离居民区(这里参考的指标是点
到直线
的距离要尽可能大). 现估测得
两个中转站每天集中的生活垃圾量分别约为
吨和
吨,问垃圾发电厂该如何选址才能同时满足上述要求?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c748e40ba21ac5063d3bccaa57ef278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81687c0af83f550bcb802e2d82c76a61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53c7539ed297ea63b9ace6f5cc58ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e6f1af4b44b2e97e8f319bab4ae9010.png)
![](https://img.xkw.com/dksih/QBM/2016/2/15/1572472770240512/1572472776400896/STEM/7fb15e68006f42b79394abc020091b6f.png)
您最近一年使用:0次
2016-12-04更新
|
592次组卷
|
2卷引用:江苏省无锡市第一中学2017-2018学年高二上学期期中数学试题
真题
7 . 如图,已知
是棱长为3的正方体,点
在
上,点
在
上,且
,
(1)求证:
四点共面;
(2)若点
在
上,
,点
在
上,
,垂足为
,求证:
面
;
(3)用
表示截面
和面
所成锐二面角大小,求
.
![](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/2777840758e70e7dbbc18cef8f3d6d2b.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/050684777347eb5080af782585cb2eb9.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80cd9e576d5fe44e005dd043c6b2ec40.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffc8ddbd328cef3b83fc16a0d82595e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b63aff58645743ad21bb974814af4924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53569e6ec795658b4fffcddeebe0f142.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(3)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a46615f8a942d2b83f40a71ff96eef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43660b1543b3a2b46185f7629d28a963.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/12/b6b87478-c50f-4e09-ac1f-56d790239e1e.png?resizew=177)
您最近一年使用:0次
2017-10-24更新
|
362次组卷
|
2卷引用:江苏省睢宁县古邳中学2017-2018学年高二上学期第一次月考数学试题
8 . 已知圆M:
与
轴相切.
(1)求
的值;
(2)求圆M在
轴上截得的弦长;
(3)若点
是直线
上的动点,过点
作直线
与圆M相切,
为切点,求四边形
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7238fef125e59100c681785ed2f28c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)求圆M在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/084b7e3980ce2aba02c620e9655f84d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec51d1ad99e9e93296c43ed1b2b8ed5e.png)
您最近一年使用:0次
2017-11-20更新
|
799次组卷
|
2卷引用:江苏省南京外国语学校仙林分校中学部2017--2018第一学期高二上学期期中测试数学试卷
9 . 三棱锥
中,平面
平面
,
,
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/2017/6/27/1718136420679680/1720614561357824/STEM/cae0260f-68a1-4934-9ea7-660a5a739283.png?resizew=223)
(1)求证:
平面
;
(2)若
,求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.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/1134c8e3440abb6cd385af2c169037fe.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/2017/6/27/1718136420679680/1720614561357824/STEM/cae0260f-68a1-4934-9ea7-660a5a739283.png?resizew=223)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f16835e3f230ba3f543b6804e445e283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a651eb577dbada1f29590e558d6f9fa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6261790c66cc71ee3898afabad0c09f4.png)
您最近一年使用:0次
2017-07-01更新
|
788次组卷
|
2卷引用:江苏省扬州市2016-2017学年高一下学期期末调研数学试题
10 . 如图,四棱锥
中,底面
为平行四边形,
,
,
底面
.
(1)证明:
;
(2)设
,求点
到面
的距离.
![](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/c6e0b64d25ddd18454f88e40c45d7d8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4e4a162f12d12a082b8d8fdd1aeab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b07e317ffe7859e81b42ef4970e344a.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b610c9b9948d88eda8de0fb8d1cf972.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/21/26813d5c-7ffd-4886-9b5b-dc87dd6ea18e.png?resizew=158)
您最近一年使用:0次
2016-12-04更新
|
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9卷引用:江苏省太仓市明德高级中学2017-2018学年高二上期中复习(立体几何)数学试题
江苏省太仓市明德高级中学2017-2018学年高二上期中复习(立体几何)数学试题江苏省南京师范大学附属实验学校2022-2023学年高一下学期5月月考数学试题(已下线)2012届广西桂林中学高三11月月考文科数学试卷(已下线)2012—2013学年山西省太原五中高二10月月考国际班数学试卷2014-2015学年河北省满城中学高一下学期期中文科数学试卷2015-2016学年湖南省株洲十八中高一上学期期末数学试卷2017届湖南益阳市高三9月调研数学(文)试卷【校级联考】黑龙江省牡丹江市第三高级中学2018-2019学年高二上学期期中考试数学试题新疆克拉玛依市北师大克拉玛依附属中学2018-2019学年高一下学期期末考试数学试题