解题方法
1 . 如图,在三棱柱
中,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/09199d19-bb37-40db-8607-6f6462bdcc0c.png?resizew=169)
(1)求证:
.
(2)若
为
的中点,问棱
上是否存在点
,使得
平面
?若存在,求出
的值,并给出证明;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d17d14819681c455a91d7678742368.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a546cc14306823545141fd57225208ec.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/09199d19-bb37-40db-8607-6f6462bdcc0c.png?resizew=169)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf5ae8d145c5ce43e4cfc95fe6f563ed.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2d109733379365295b93c58769d2019.png)
您最近一年使用:0次
解题方法
2 . 如图,四棱锥
中,点
是底面正方形
的中心,
平面
,点
在棱
上.
![](https://img.xkw.com/dksih/QBM/2020/12/9/2610335733760000/2612112278110208/STEM/32a23429eba84032a45b10b0c60b16dd.png?resizew=253)
(1)若
是
的中点,求证:
平面
;
(2)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e126c16032892966489053f44b9048.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://img.xkw.com/dksih/QBM/2020/12/9/2610335733760000/2612112278110208/STEM/32a23429eba84032a45b10b0c60b16dd.png?resizew=253)
(1)若
![](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/373f735f0f04d11f1951eaef1bb78b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
您最近一年使用:0次
2020-12-11更新
|
662次组卷
|
2卷引用:福建省2021届普通高中学业水平合格性考试(会考 )适应性练习数学试卷二试题
名校
解题方法
3 . 如图,在四棱柱
中,底面
是菱形,
底面
,点
是
的中点.
平面
;
(2)求证: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/9ddbb0422a136f45653c8c369f2d75fc.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/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f11f1840eb8b17e7b07c3fe7e987a9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e2da608b66c9aee03e2503388ba4fd.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4a46fbde58e12b1edc038ae9e921722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc78a86b12ba0b4553135a3a635fc418.png)
您最近一年使用:0次
2020-12-06更新
|
1143次组卷
|
3卷引用:福建省2021届普通高中学业水平合格性考试(会考 )适应性练习数学试卷一试题
4 . 如图,已知四边形
是菱形,
,
绕着
顺时针旋转
得到
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/2021/10/12/2827861522194432/2833521877753856/STEM/4067c52e-a665-49c2-9b47-c07f47e18080.png)
(1)求证:
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6906f59d09ce31956d6f5ea2b23fc77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231b861d6d1f1d0b9f52b041cb40eb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acee03d4bb4667b6c345221b6c9b0fa4.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/2021/10/12/2827861522194432/2833521877753856/STEM/4067c52e-a665-49c2-9b47-c07f47e18080.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c2b786c64e6a9ed2ec5670cde74f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
名校
解题方法
5 . 如图,在直三棱柱ABC-A1B1C1中,已知AC⊥BC,BC=CC1.设AB1的中点为D,B1C∩BC1=E.
(2)BC1⊥AB1.
(2)BC1⊥AB1.
您最近一年使用:0次
2021-09-13更新
|
727次组卷
|
25卷引用:2020届湖南新课标普通高中学业水平考试仿真模拟卷数学试题卷二
2020届湖南新课标普通高中学业水平考试仿真模拟卷数学试题卷二(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(已下线)专题35直线、平面垂直的判定与性质-2022年(新高考)数学高频考点+重点题型(已下线)考点48 直线与平面、平面与平面垂直-备战2022年高考数学一轮复习考点帮(新高考地区专用)【学科网名师堂】(已下线)专题23 立体几何解答题(理科)-1(已下线)专题23 立体几何解答题(文科)-1辽宁省六校协作体2017-2018学年高二下学期期初考试数学(文)试题黑龙江省伊春市第二中学2017-2018学年高一下学期期末考试数学(文)试题安徽省阜阳市红旗中学2018-2019学年高一第一学期期末考试试题数学(理科)试题(已下线)第01章 章末检测-2018-2019版数学创新设计课堂讲义同步系列(苏教版必修2)【全国百强校】辽宁省庄河市高级中学2018-2019学年高二下学期开学考试数学(文)试题人教A版高中数学必修二 2.3.3 直线与平面垂直的性质1安徽省淮北师范大学附属实验中学2018-2019学年高一下学期第一次月考数学试题第二章 应用·拓展·综合训练(二)江苏省连云港市锦屏高级中学2018-2019学年高一下学期期中数学试题宁夏青铜峡市高级中学2019-2020学年高二上学期期末考试数学(理)试题甘肃省天水一中2019-2020学年高一上学期第三学段(期末)考试数学试题宁夏青铜峡市高级中学2020-2021学年高二上学期第一次月考数学试题陕西省西安市华山中学2020-2021学年高一上学期第二次月考数学试题重庆市第三十七中学校2020-2021学年高二上学期期中数学试题安徽省安庆市怀宁县第二中学2020-2021学年高二上学期期中数学(理)试题新疆乌鲁木齐市第二十中学2020-2021学年高二上学期期末考试数学试题福建省南安市侨光中学2020-2021学年高一下学期期中阶段考试数学试题新疆新源县第二中学2019-2020学年高一下学期期末考试数学试题湖南省郴州市明星高级中学2022-2023学年高二上学期第二次月考数学试题
名校
解题方法
6 . 如图,在三棱锥
中,
平面
,
,
,
分别为
,
的中点.求证
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/4f49693e-bf73-4e62-be0c-6d19e8a48c29.png?resizew=160)
(1)
平面
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.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/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/4f49693e-bf73-4e62-be0c-6d19e8a48c29.png?resizew=160)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78172568aac9805d2ea2d5f742bf80c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9874eca4abea481fa84eb772a920f9c7.png)
您最近一年使用:0次
2020-12-02更新
|
591次组卷
|
3卷引用:2020年湖北省普通高中学业水平合格性考试数学试题
解题方法
7 . 如图所示,三棱锥P-ABC中,PA⊥平面ABC,AB⊥AC,且E,F分别为BC,PC的中点.
![](https://img.xkw.com/dksih/QBM/2020/10/28/2580989840990208/2582754333769728/STEM/f0994bc0e71040a1945041f150914dc1.png?resizew=216)
(1)求证: EF//平面PAB;
(2)已知AB=AC=4,PA=6,求三棱锥F-AEC的体积.
![](https://img.xkw.com/dksih/QBM/2020/10/28/2580989840990208/2582754333769728/STEM/f0994bc0e71040a1945041f150914dc1.png?resizew=216)
(1)求证: EF//平面PAB;
(2)已知AB=AC=4,PA=6,求三棱锥F-AEC的体积.
您最近一年使用:0次
2020-10-31更新
|
1736次组卷
|
4卷引用:2023年1月广东省普通高中学业水平合格性考试模拟三数学试题
解题方法
8 . 如图,棱柱
的侧面
是菱形,
.
![](https://img.xkw.com/dksih/QBM/2021/1/17/2638087007141888/2641433886441472/STEM/4e58a3a9ce934c4fad569ee708006f35.png?resizew=191)
(1)证明:平面
平面
;
(2)设
是
上的点且
平面
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6853cf0a408492342e481e7958b036a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a3c1e54f0318d3fab1742308cad4bc8.png)
![](https://img.xkw.com/dksih/QBM/2021/1/17/2638087007141888/2641433886441472/STEM/4e58a3a9ce934c4fad569ee708006f35.png?resizew=191)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e3a59d7bf91a7540e35ce0011ad9b97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9539f8fb13345b449274b67bbda995db.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/896e293411e2fd0da215ff20781cb36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62fd0b510920be6bc60d170c3ff3da3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52487e403a1dcaede9ceb2e06677c7ee.png)
您最近一年使用:0次
解题方法
9 . 如图,斜三棱柱
中,
是边长为2的正三角形,
为
的中点,
平面
,点
在
上,
,
为
与
的交点,且
与平面
所成的角为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/5bd35e24-40cb-453b-8580-5cbfded9946d.png?resizew=226)
(1)求证:
平面
;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e5981445b6f2a6c58974158d96a4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb1cac8174f8a30b7be0dc8419ed8ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec275f823ae17afdba53301fcbd2aa43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/5bd35e24-40cb-453b-8580-5cbfded9946d.png?resizew=226)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e1ac4a3e715fea3e38a59d86eb272ca.png)
您最近一年使用:0次
2020-05-12更新
|
550次组卷
|
4卷引用:山东省2019-2020学年普通高中学业水平等级考试4月(模拟)数学试题
山东省2019-2020学年普通高中学业水平等级考试4月(模拟)数学试题2020届山东省临沂市高三一模数学试题(已下线)专题九 立体几何与空间向量-2020山东模拟题分类汇编江苏省无锡市江阴市成化高级中学2020-2021学年高三上学期12月第二次月考数学试题
10 . 如图,在四棱锥
中,
平面ABCD,底面ABCD是正方形,AC与BD交于点O,E为PB的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/2487c566-044e-441d-a5ae-fafe259a4fc3.png?resizew=152)
(1)求证:
平面PDC;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/2487c566-044e-441d-a5ae-fafe259a4fc3.png?resizew=152)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebca490fc8af91b6b3b5e0a33af2968c.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b757706eee506a078fc25e3f33a70cb.png)
您最近一年使用:0次