名校
1 . 如图,已知一个八面体的各条棱长均为2,四边形ABCD为正方形,给出下列说法:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/0f4f4e3c-b80a-46fa-8106-dd7da09a91e9.png?resizew=176)
①该八面体的体积为
;②该八面体的外接球的表面积为8π;
③E到平面ADF的距离为
;④EC与BF所成角为60°.
其中正确的说法为__________ .(填序号)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/0f4f4e3c-b80a-46fa-8106-dd7da09a91e9.png?resizew=176)
①该八面体的体积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a391005600bdd69c96750589f9adb048.png)
③E到平面ADF的距离为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
其中正确的说法为
您最近一年使用:0次
2020-11-29更新
|
584次组卷
|
6卷引用:安徽省宿州市泗县第一中学2021-2022学年高二上学期开学考试数学试题
解题方法
2 . 如图,在三棱锥
中,
平面
,
,
为线段
的中点,
为线段
上一动点,且
,
.
(1)求证:
平面
.
(2)当
∥平面
时,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2f39d3fcb1664705228e683c2cc3b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](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/3015db5ca1f49bb7bad43657e06863ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37750daa8ba3b3fe3e9e2092f81c848.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1601b174c1c0d24b6bc9fbb96c3d701.png)
![](https://img.xkw.com/dksih/QBM/2018/11/16/2076985613385728/2079058714550272/STEM/d9513b9d-6378-4d59-8232-226ef5a87480.png)
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3 . 如图所示,正方体的棱长为2,以其所有面的中心为顶点的多面体的体积为( )
![](https://img.xkw.com/dksih/QBM/2018/11/16/2076985613385728/2079058714320897/STEM/4332832be5d0472d8cab6c41e541bfb2.png?resizew=156)
![](https://img.xkw.com/dksih/QBM/2018/11/16/2076985613385728/2079058714320897/STEM/4332832be5d0472d8cab6c41e541bfb2.png?resizew=156)
A.4 | B.![]() | C.![]() | D.3 |
您最近一年使用:0次
2018-11-19更新
|
900次组卷
|
4卷引用:【校级联考】安徽省宿州市十三所重点中学2018-2019学年高二上学期期中考试数学(理)试题
4 . 如图,四棱锥
的底面是正方形,
,
,
,点
分别为棱
的中点.
(1)求证:
∥平面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50569f012f6c1f3cfe0613972328ff0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e32cc188edc26012eb4e332c8b7b05d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cac4ee9a98647379757a6f643fb73438.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9068f29d671d76d1e95ba3a4eaff5b96.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0ab94d15bfe22a6da47df97fc19ee4d.png)
![](https://img.xkw.com/dksih/QBM/2018/11/1/2066162509135872/2067771701772288/STEM/efe2be0c-abe3-4857-9a1f-1372695fb5bb.png)
您最近一年使用:0次
2018-11-03更新
|
1035次组卷
|
5卷引用:安徽省宿州市泗县第一中学2020-2021学年高二下学期开学考试数学(理)试题
名校
5 . 已知
是球
的球面上两点,
,
为该球面上的动点,若三棱锥
的体积的最大值为
,则球
的表面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9faea4deadc69fec42afab055f464340.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1751357d6986d432d2eec447b2f07218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
6 . 在正三棱锥
中
,点
、
、
分别是
、
、
中点,若
,则该三棱锥外接球的表面积___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01066a827559b97114cfce8b0d0dec50.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6e2867f32d3f1c3cd36cd3a11a8580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4db9b82b67efe45a02fca32bfcf5dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b6cc3789c0e9b7d1226aa0de3327599.png)
您最近一年使用:0次
名校
解题方法
7 . 如图一个空间几何体的正视图,侧视图,俯视图是全等的等腰直角三角形,且直角边的边长为1,那么这个几何体的体积等于( )
![](https://img.xkw.com/dksih/QBM/2021/2/26/2666441450020864/2667797228683264/STEM/8671f6fa-4204-4cac-a1fc-6d7eb3babc0b.png)
![](https://img.xkw.com/dksih/QBM/2021/2/26/2666441450020864/2667797228683264/STEM/8671f6fa-4204-4cac-a1fc-6d7eb3babc0b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-02-28更新
|
346次组卷
|
2卷引用:安徽省宿州市泗县第一中学2020-2021学年高二下学期开学考试数学(理)试题
8 . 一个几何体的三视图如图所示,那么这个几何体的体积为
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/044d37b7-4ebd-49f3-b244-c960f87c2023.png?resizew=174)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/044d37b7-4ebd-49f3-b244-c960f87c2023.png?resizew=174)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-04-29更新
|
707次组卷
|
4卷引用:安徽省泗县第一中学2019届高三高考最后一模数学(文)试题
解题方法
9 . 如图,矩形
所在平面与半圆弧
所在平面垂直,且
,
是
上异于
,
两点的一个动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/18/24e02030-9a8b-4ed2-b0a9-57927a5697d6.png?resizew=193)
(1)证明:
平面
;
(2)当四棱锥
的体积最大且最大值为9时,求该四棱锥
的侧面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bb3820bab977db734f4335e4fde720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f70d6f5baadf8139ee650b84f2fde70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bb3820bab977db734f4335e4fde720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/18/24e02030-9a8b-4ed2-b0a9-57927a5697d6.png?resizew=193)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fb7c585995d694d03475797830ca98f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ddb7c2ca1b6bee86cb24fed02e40da2.png)
(2)当四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4117625867a74cd022584500c76deca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4117625867a74cd022584500c76deca.png)
您最近一年使用:0次
2020-11-29更新
|
455次组卷
|
2卷引用:安徽省宿州市十三所重点中学2020-2021学年高二上学期期中联考数学(文)试题
解题方法
10 . 已知正三棱锥
的体积为
,其外接球球心为
,且满足
,则正三棱锥
的外接球半径为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d7abf02717d6e59d8a64a65a87c412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44aa4045bdfad62809441d59206aa390.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
您最近一年使用:0次