解题方法
1 . 已知半球内有一个内接正方体,正方体的一个面在半球的底面圆内,若正方体的棱长为
,则半球的体积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2 . 已知半球内有一个内接正方体,正方体的一个面在半球的底面圆内,若正方体的棱长为
,则半球的表面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
3 . 图1是
,
,
,
、
分别是边
、
上的两点,且
,将
沿
折起使得
,如图2.
![](https://img.xkw.com/dksih/QBM/2022/1/6/2888494942896128/2889382875389952/STEM/60e1968a-e82e-40df-bb82-9fb7ae350aa9.png?resizew=307)
(1)证明:图2中,
;
(2)图2中,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0e4370a66e189d31f80f7820c2eec2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13ba5383e768dc86e1bfd79c10f96f4d.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8574a5baceb60936eb1edc5afed48666.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c771a4feb150ad9cff8d70431c97eb17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a466276f3b4a9a59addcaa6f68b6a850.png)
![](https://img.xkw.com/dksih/QBM/2022/1/6/2888494942896128/2889382875389952/STEM/60e1968a-e82e-40df-bb82-9fb7ae350aa9.png?resizew=307)
(1)证明:图2中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9977e550ed5d538217f54b17a477a7d.png)
(2)图2中,求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3931333820859378ea6723ff3075189.png)
您最近一年使用:0次
名校
解题方法
4 . 如图,一辆汽车在一条水平的公路上向西行,到
处时测得公路北侧远处一山顶
在西偏北30o的方向上,行驶10km后到达
处,测得此山顶在西偏北60o的方向上,仰角为30o.(注:山高
平面
)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/55a27e3e-5d19-4ccd-9a77-fd8bab19883a.png?resizew=160)
(1)求直线
与平面
所成角的正切值;
(2)求四面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/55a27e3e-5d19-4ccd-9a77-fd8bab19883a.png?resizew=160)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求四面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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名校
5 . 如图,在三棱锥
中,
,
,∠ABC=90o,平面
平面
,D、E分别为AB、AC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/cb91a3e6-f8a7-4a23-8ddc-6efaffca670f.png?resizew=172)
(1)求证:
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7fcc62f1c0536d8f82409e8c8df7beb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/cb91a3e6-f8a7-4a23-8ddc-6efaffca670f.png?resizew=172)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f45265eaed2ba5fc08f6a112a02cd2.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212b200cb65843fe03aab377d53991d7.png)
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13-14高二上·浙江绍兴·期中
名校
6 . 正方体
的棱长为1,线
上有两个动点E、F,且
,则下列结论中错误的是( )
![](https://img.xkw.com/dksih/QBM/2021/11/23/2857381330378752/2859167247745024/STEM/84720687-3318-4d50-9f5f-7cb8ed989b59.png?resizew=222)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e438a162ed349f7f25333e8f6c044e6d.png)
![](https://img.xkw.com/dksih/QBM/2021/11/23/2857381330378752/2859167247745024/STEM/84720687-3318-4d50-9f5f-7cb8ed989b59.png?resizew=222)
A.![]() |
B.三棱锥![]() |
C.二面角![]() |
D.异面直线AE、BF所成角为定值 |
您最近一年使用:0次
2021-11-25更新
|
426次组卷
|
6卷引用:四川省凉山宁南中学2020-2021学年高二上学期第二次月考数学(理)试题
四川省凉山宁南中学2020-2021学年高二上学期第二次月考数学(理)试题(已下线)2013-2014学年浙江绍兴一中高二第一学期期中测试理科数学试卷(已下线)2013-2014学年浙江绍兴一中高二第一学期期中测试文科数学试卷四川省泸州市泸县第一中学2021-2022学年高二下学期入学考试数学(文)试题河南省八所名校2021-2022学年高二下学期第三次联考文科数学试题(已下线)第二章 立体几何中的计算 专题六 空间定值问题 微点4 立体几何中的定角问题【培优版】
解题方法
7 . 如图,四棱锥
中,
是正方形,
平面
,
、
分别
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/d5157544-7a9e-479b-b840-685192d8e734.png?resizew=199)
(1)证明:
平面
;
(2)已知
,
为棱
上的点,
,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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/d5157544-7a9e-479b-b840-685192d8e734.png?resizew=199)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5197ab95ab9c0e1f96fd547b04d07b03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a7dea044573cfe3be4219cc15f5603.png)
您最近一年使用:0次
解题方法
8 . 三棱锥
中,二面角
大小为
,且
,
,
.若点
、
、
、
都在同一个球面上,则该球的表面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a4bddf1ea3c5d37f2233a4821909e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231b861d6d1f1d0b9f52b041cb40eb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a8c71d5319938a55362648ab73795b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/883fc5e3faf39829d60804b59deb1730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
9 . 如图,在圆锥
中,
为
的直径,点
在
上,
,
.
![](https://img.xkw.com/dksih/QBM/2021/5/11/2718671582076928/2725943324737536/STEM/db63be4e-7165-4c0c-96e4-f483e6d82216.png?resizew=224)
(1)证明:
平面
;
(2)若直线
与底面所成角的大小为
,且底面圆的面积为
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/667349d99185bb045030b733352ff7fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a8dccfaf49b0f8e0fd927f30a50cdfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d81d0bc9531fb9340cdbd0ff55fb44.png)
![](https://img.xkw.com/dksih/QBM/2021/5/11/2718671582076928/2725943324737536/STEM/db63be4e-7165-4c0c-96e4-f483e6d82216.png?resizew=224)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15b63176f43bc7a0654d0f6f45e7429.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20b3a91ccf6028608cd03df7072f6536.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9819d39cb7374fa753e206022e19f3.png)
您最近一年使用:0次
2021-05-21更新
|
756次组卷
|
4卷引用:四川省凉山州2021届高三三模数学(文)试题
四川省凉山州2021届高三三模数学(文)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)(已下线)一轮复习大题专练44—立体几何(体积3)-2022届高三数学一轮复习甘肃省高台县第一中学2022届高三下学期第七次检测数学(文)试题
解题方法
10 . 日常生活中,有各式各样精美的糖果包装礼盒某个铁皮包装礼盒的平面展开图是由两个全等的矩形,两个全等的三角形和一个正方形所拼成的多边形(如图),矩形的长为
,矩形的宽和正方形的边长均为
.若该包装盒内有一颗球形硬糖的体积为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
,则
的最大值为( )
![](https://img.xkw.com/dksih/QBM/2020/12/28/2623767548272640/2626240315310080/STEM/3865fc4dd9134fcab37ff6a260ed4d0d.png?resizew=265)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/689ff84e2d7f52c7446ef789a54557da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80b1fe1b971b780e443a9b13621611c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc6d1d99afa158b4ba4fc0dae562fcc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
![](https://img.xkw.com/dksih/QBM/2020/12/28/2623767548272640/2626240315310080/STEM/3865fc4dd9134fcab37ff6a260ed4d0d.png?resizew=265)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-12-31更新
|
554次组卷
|
5卷引用:四川省凉山州2021届高三一模数学(理)试题
四川省凉山州2021届高三一模数学(理)试题四川省凉山州2020-2021学年高三第一次诊断性检测数学(文科)试题四川省凉山州2021届高三一模数学(文)试题(已下线)重难点 03 空间向量与立体几何-2021年高考数学(理)【热点·重点·难点】专练(已下线)专题05 空间几何体的三视图、表面积和体积-备战2021届高考数学(文)二轮复习题型专练?(通用版)