1 . 衢州市某公园供市民休息的石凳是阿基米德多面体,它可以看做是一个正方体截去八个一样的四面体得到的二十四等边体(各棱长都相等),已知正方体的棱长为30cm.
(1)证明:平面
平面
;
(2)求石凳所对应几何体的体积.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/23/bd4d5666-d2cd-4cf7-b6f1-9672217cc559.png?resizew=163)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85469a248bf54671d1f500b7812ff100.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/883db9a0ae796aefc51c6d9bc46da301.png)
(2)求石凳所对应几何体的体积.
您最近一年使用:0次
2023-06-22更新
|
375次组卷
|
3卷引用:四川省成都市双流中学2022-2023学年高三上学期适应性数学(理科)试题
2 . 如图,在三棱锥
中,
,点
分别是
的中点,
底面
.
![](https://img.xkw.com/dksih/QBM/2022/11/20/3113866250829824/3116714997489664/STEM/42dedfbcbb0843afa4fec997d3629d98.png?resizew=187)
(1)求证:
平面
;
(2)求直线
与平面
所成角的正弦值大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3458ac2f57ca59ad8052807621cf0ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe964aa3574061970c9c8066df21c89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a76d097f3d2a6cf2c76b1e3f41dfe7fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbc6f007dbf1c1a36eb031e520608403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/2022/11/20/3113866250829824/3116714997489664/STEM/42dedfbcbb0843afa4fec997d3629d98.png?resizew=187)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/377ca47ae9b5ea2a870b6c0b12cfa010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2022-11-24更新
|
127次组卷
|
2卷引用:四川省安岳县石羊中学2022-2023学年高二上学期期中检测数学理科试题
名校
解题方法
3 . 如图,已知
平面
,
,
,
,
,E和F分别为
和
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/aab223e0-7342-4b70-bf81-c36aa06b18bc.png?resizew=158)
(1)求证:
平面
;
(2)求证:平面
平面
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460affeeace976471099f4385663c979.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e4f0c1c9cca0555906d8a53e1a6803d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e780db3b0d41a7da6d4bfb9178af5bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/16/aab223e0-7342-4b70-bf81-c36aa06b18bc.png?resizew=158)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bea124cef7ab3fd8069243e9894d1c59.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6501f1c913a4ef64957a2f01ab5baa15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb7f072f0834ebdf155abc5dcc9c8d99.png)
您最近一年使用:0次
名校
解题方法
4 . 如图所示,在直三棱柱
中,
,
平面
,D为AC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/b876a8e6-620b-40d4-8d93-48954da365c6.png?resizew=194)
(1)求证:
平面
;
(2)求证:
平面
;
(3)在
上是否存在一点E,使得
,若存在,试确定E的位置,并判断平面
与平面
是否垂直?若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d33ebce3dd8905d4f954015823fa480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cdf60b46965a33b15fec40f733d9c0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d1d2e0f281222a5f289ea4008370aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/b876a8e6-620b-40d4-8d93-48954da365c6.png?resizew=194)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac5ea494bb75a5c04e61c9e32aceabc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a59d296654aa17749f8300ae1d1da0e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
(3)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/330dbdf94bfd6490f872cd93589db154.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
您最近一年使用:0次
名校
5 . 如图所示,在四棱锥
中,底面
是边长为2的正方形,其它四个侧面都是侧棱长为
的等腰三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/9ddb9af6-7663-480c-987e-8bbb9348e43a.png?resizew=202)
(1)求二面角
的大小;
(2)在线段
上是否存在一点
,使平面
平面
?若存在,请指出点
的位置并证明,若不存在请说明理由.
![](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/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/9ddb9af6-7663-480c-987e-8bbb9348e43a.png?resizew=202)
(1)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d294d69caac577339f11f477b2047e.png)
(2)在线段
![](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/22583ac400216f5aa56a84284efe4b12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
您最近一年使用:0次
名校
解题方法
6 . 如图, 在直角梯形
中,
为
的中 点, 沿
将
折起, 使得点,
到点
位置, 且
为
的中点,
是
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/2b2406e7-ffc5-418f-bc0b-5fed512995e3.png?resizew=370)
(1)证明:
平面
;
(2)证明: 平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4db4a66b34423610e4eb42a3ae04f44a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eae110ccbb0581fef7bd27abf86d1f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a6c6e7c025362c46a64a8956761f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefe4a3e7a7fa195ed6a6712447639b7.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/ff8759f41fa4d907fbe9963465827718.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30513ea48bc1ef3ae78adac83d894f14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9c53464b501047bcfc367770a8a6f7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/2b2406e7-ffc5-418f-bc0b-5fed512995e3.png?resizew=370)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd19c4db61254be8512edf741bf9f978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7609a1407f1e965fc9f1235552dcf9e.png)
(2)证明: 平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62091e8d90c33575003b7e7c2099665f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/840798a31aba0783f96584e0ad7c0d2e.png)
您最近一年使用:0次
名校
解题方法
7 . 正三棱柱
的底面正三角形的边长为
,
为
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/163c5ecf-f69e-48cd-a074-a7daaeb29c28.png?resizew=238)
(1)证明:
平面
;
(2)求该三棱柱的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/163c5ecf-f69e-48cd-a074-a7daaeb29c28.png?resizew=238)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/896e293411e2fd0da215ff20781cb36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba9e20d667d04bf3ee7f55cc795ce01.png)
(2)求该三棱柱的体积.
您最近一年使用:0次
2022-11-03更新
|
3921次组卷
|
10卷引用:四川省峨眉第二中学校2022-2023学年高二上学期10月月考文科数学试题
四川省峨眉第二中学校2022-2023学年高二上学期10月月考文科数学试题四川省峨眉第二中学校2022-2023学年高二上学期10月月考理科数学试题2022年黑龙江省普通高中学业水平合格性考试数学模拟试卷一四川省成都市金牛区实外高级中学有限公司2023-2024学年高二上学期入学考数学试题第八章立体几何初步章节验收测评卷-【精讲精练】2022-2023学年高一数学下学期同步精讲精练(人教A版2019必修第二册)(已下线)6.6.2柱、锥、台的体积(课件+练习)(已下线)13.3.2 空间图形的体积湖北省黄冈市黄州中学(黄冈外校)2022-2023学年高一(平行班+宏志班)下学期第六次阶段性测试数学试题云南省宣威市第三中学2023-2024学年高二上学期开学收心考试数学试题2023年湖南省衡阳市普通高中学业水平合格性仿真(F)数学试题
解题方法
8 . 如图,在三棱锥S﹣ABC中,SA=SB=AC=BC=2,
,SC=1,D,E分别为SA,AB的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/15e27ec0-6071-4c8a-b434-c31b44e4e949.png?resizew=167)
(1)求证:DE
平面BCS;
(2)求三棱锥S﹣ABC的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/15/15e27ec0-6071-4c8a-b434-c31b44e4e949.png?resizew=167)
(1)求证:DE
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
(2)求三棱锥S﹣ABC的体积.
您最近一年使用:0次
2022-12-16更新
|
282次组卷
|
3卷引用:四川省绵阳市开元中学2021-2022年学年高一下学期期末适应性质量检测理科数学试题
四川省绵阳市开元中学2021-2022年学年高一下学期期末适应性质量检测理科数学试题四川省绵阳市开元中学2021-2022年学年高一下学期期末适应性质量检测文科数学试题(已下线)专题四 期末高分必刷解答题(32道)-《考点·题型·密卷》
名校
解题方法
9 . 如图,在长方体
中,底面四边形
是正方形.
![](https://img.xkw.com/dksih/QBM/2022/9/3/3058467042279424/3060523932844032/STEM/014cb6eb998b4e86891b095a2576c4e7.png?resizew=167)
(1)求证:
平面
;
(2)若
,求几何体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2022/9/3/3058467042279424/3060523932844032/STEM/014cb6eb998b4e86891b095a2576c4e7.png?resizew=167)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4cd2b33bd983a9ed6575b9de04a46a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/622a61b260c96966e2527e346f4288ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a736592053ca39e373bd9ff417c77c.png)
您最近一年使用:0次
名校
解题方法
10 . 如图,四棱锥
中,底面
为边长为2的菱形且对角线
与
交于点O,
底面
,点E是
的中点.
![](https://img.xkw.com/dksih/QBM/2022/9/1/3057193993101312/3060523413766144/STEM/cf2f4a7f04334206a3e5b8af33f8d5f8.png?resizew=194)
(1)求证:
∥平面
;
(2)若三棱锥
的体积为
,求
的长.
![](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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e46367882078adaa49ff44569bceb5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/2022/9/1/3057193993101312/3060523413766144/STEM/cf2f4a7f04334206a3e5b8af33f8d5f8.png?resizew=194)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)若三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1112ffa328ed486ffc5e4a605eb510e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
您最近一年使用:0次
2022-09-06更新
|
1298次组卷
|
4卷引用:四川省绵阳市2021-2022学年高一下学期期末数学试题
四川省绵阳市2021-2022学年高一下学期期末数学试题广东省深圳市高级中学2022-2023学年高二上学期期中数学试题(已下线)第八章 立体几何初步 (单元测)(已下线)8.5 空间直线、平面的平行(精讲)-2022-2023学年高一数学一隅三反系列(人教A版2019必修第二册)