名校
解题方法
1 . 已知正方形
的边长为4,
边的中点为
,现将
和
分别沿
,
折起,使得
,
两点重合为一点记为
,则四面体
外接球的表面积是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ca19321c6776be24e4be5033b60ed7.png)
您最近一年使用:0次
2021-05-06更新
|
107次组卷
|
2卷引用:福建省仙游县枫亭中学2020-2021学年高一下学期期中考试数学试题
2 . 学生到工厂劳动实践,利用
打印技术制作模型.如图,该模型为长方体
挖去四棱锥
后所得的几何体,其中
为长方体的中心,
,
,
,
分别为所在棱的中点,
,
,(参考公式
)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/ad088e13-2496-46ea-9712-dcd70c48145c.png?resizew=205)
(1)求该模型的表面积;
(2)
打印所用原料密度为
,不考虑打印损耗,求制作该模型所需原料的质量.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b3af6f61348fc3cf1e9614916afe3ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bd3cf0164966a391cd07c53ed87135a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b53624384250463b4ff1dba62618f72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4311eee7b649b9e7843ea9e139108740.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/965e38d147c3653eab55d90b7d9a994c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/ad088e13-2496-46ea-9712-dcd70c48145c.png?resizew=205)
(1)求该模型的表面积;
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b3af6f61348fc3cf1e9614916afe3ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1223bcb89def01074107c2727cbd6372.png)
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2011高二上·湖南邵阳·学业考试
名校
3 . 正方体的全面积是
,它的顶点都在一个球面上,则这个球的表面积是_________
.
![](https://img.xkw.com/dksih/QBM/2011/5/13/1570196177559552/1570196182663168/STEM/b33b22562436431da009001956daf6a2.png?resizew=47)
![](https://img.xkw.com/dksih/QBM/2011/5/13/1570196177559552/1570196182663168/STEM/c77ac37a7bec4f9bb8891cd981b1f83a.png?resizew=31)
您最近一年使用:0次
2016-11-30更新
|
1255次组卷
|
4卷引用:福建省福州延安中学2022届高三上学期开学考试数学试题
福建省福州延安中学2022届高三上学期开学考试数学试题(已下线)2011年湖南省洞口四中上学期高二学考模拟试题二河北省定州中学2016-2017学年高一下学期第二次月考数学试题宁夏贺兰县景博中学2021届高三上学期统练(四)数学(文)试题
4 . 已知直角梯形ABCD中,
,
,
,
,
,如图1所示,将
沿BD折起到
的位置,如图2所示.
![](https://img.xkw.com/dksih/QBM/2016/9/23/1573037124354048/1573037130661888/STEM/251be7db-8d75-48b4-9f8d-ac27cd8ce031.png?resizew=481)
Ⅰ
当平面
平面PBC时,求三棱锥
的体积;
Ⅱ
在图2中,E为PC的中点,若线段
,且
平面PBD,求线段BQ的长;
Ⅲ
求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5408641691fd27f6dd8cf0ab2043ad4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c8da8430ae9b811b82527eb944cea18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ad17b21f4bd28790218601b430b7c27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53cb79699af9587171892dda59ae070a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a9fa8832f98b5418a7d75892f7951b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb961bd7db3adb76af2d4cedb611bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f8b1307079384bf7accebda3c826ef5.png)
![](https://img.xkw.com/dksih/QBM/2016/9/23/1573037124354048/1573037130661888/STEM/251be7db-8d75-48b4-9f8d-ac27cd8ce031.png?resizew=481)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9557b784a82680a8c2d300060e9a2b85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06029bc3627f240d0d335d529bd3b9bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bde38ce4aa1df851b1e39b57003035ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e305e0ba4a99e063633aa1b592f4aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a75706822022aef505a35e769755efa.png)
您最近一年使用:0次
2016-12-04更新
|
795次组卷
|
3卷引用:福建省建瓯市芝华中学2020-2021学年高一下学期期中考试数学试题
5 . 在棱长为
的正方体上,分别用过共顶点的三条棱中点的平面截该正方体,则截去
个三棱锥后,剩下的几何体的体积是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
您最近一年使用:0次
2017-10-31更新
|
245次组卷
|
4卷引用:福建省龙岩市长汀县三级达标校2020-2021学年高一下学期期中考试数学试题
解题方法
6 . 已知空间四边形
每条边和对角线长都等于
,点
、
、
分别是
、
、
的中点,则
是下列哪个选项的计算结果( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.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/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8cc0b4997cae4d8aec791a1d3923314.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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