名校
解题方法
1 . 已知三棱柱
(如图所示),底面
是边长为2的正三角形,侧棱
底面ABC,
,E为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/f609e3dd-8fc9-4ac3-93c0-7e75b34b3823.png?resizew=219)
(1)证明:
平面
;
(2)求三棱锥
的体积
![](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/8a8bfe2553e852df73185d017c0a62fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d8cb98c0adee7ca698d8b17dacb845b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/f609e3dd-8fc9-4ac3-93c0-7e75b34b3823.png?resizew=219)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4557a368725226f2c8ea2efb7d30e478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/641d9688e81760c02d0dfc4ba015afb1.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cd5d1b72eccfb437d85ae09382026ee.png)
您最近一年使用:0次
2021-01-17更新
|
95次组卷
|
2卷引用:安徽省淮南市寿县第一中学2020-2021学年高一下学期6月质量检测数学试题
2 . 如图,矩形
中,对角线
、
的交点为G,
平面
,
,
,F为
上的点,且
.
![](https://img.xkw.com/dksih/QBM/2021/1/6/2630286467481600/2633041986543616/STEM/873e0286-d1fa-4088-a36a-a35586c6f9f2.png?resizew=241)
(I)求证:平面
平面
;
(II)求三棱锥
的体积.
![](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/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b29f27c9a3af7044faf147bdaeb3fe81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55b3581f73c778ecb0931c1ab30392ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cbfc35fc915ac7d4dc017e60ccdecbe.png)
![](https://img.xkw.com/dksih/QBM/2021/1/6/2630286467481600/2633041986543616/STEM/873e0286-d1fa-4088-a36a-a35586c6f9f2.png?resizew=241)
(I)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dc6db50a9709c3f4d84eee7bdf1250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
(II)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26e25ee66687503e95362f2cad5b2ac.png)
您最近一年使用:0次
3 . (1)已知球的半径为4,求此球的表面积和体积;
(2)圆柱的母线长为1,底面周长为2π,求圆柱的体积.
(2)圆柱的母线长为1,底面周长为2π,求圆柱的体积.
您最近一年使用:0次
4 . 已知圆台的上、下底面半径分别是
和
,高是
.
(1)求圆台的表面积,
(2)求圆台的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
(1)求圆台的表面积,
(2)求圆台的体积.
您最近一年使用:0次
2020-12-29更新
|
241次组卷
|
2卷引用:安徽省六安市城南中学2020-2021学年高二(卓越、宏志班)上学期期中数学(理)试题
5 . 如图,四棱台
,上、下底面均是正方形,且侧面是全等的等腰梯形,且
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/12/9/2610468852146176/2614965853339648/STEM/763a0f1c45d4429898507ec36451c705.png?resizew=293)
(1)求四棱台
的侧面积;
(2)求四棱台
的体积.(台体体积公式
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9889e15ad926dfc0dfa2a2fc33e53dd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ffecf3b25626bdbe8aa3f0c5d79c7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be40cb5f084bc9c93d86ea635c5d1f04.png)
![](https://img.xkw.com/dksih/QBM/2020/12/9/2610468852146176/2614965853339648/STEM/763a0f1c45d4429898507ec36451c705.png?resizew=293)
(1)求四棱台
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
(2)求四棱台
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d308c623df5e32977bcb36cf1ddaee30.png)
您最近一年使用:0次
2020-12-15更新
|
840次组卷
|
4卷引用:安徽省合肥市第六中学2020-2021学年高二上学期期中数学(理)试题
名校
解题方法
6 . 在矩形
中,将
沿其对角线
折起来得到
,且平面
平面
(如图所示).
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/0fb2fbd9-63a0-49d8-8252-825e747f3632.png?resizew=307)
(1)证明:
平面
;
(2)若
,
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c510b85dfbca0e3ab0744655d77e8c93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0fe22d526d1da4d61436c59e7517328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/0fb2fbd9-63a0-49d8-8252-825e747f3632.png?resizew=307)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4560fa4ad459b58b723c74bd24e51ebf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62fd0b510920be6bc60d170c3ff3da3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ecc884f5b4dc9622e90e1303bc481f5.png)
您最近一年使用:0次
2020-11-29更新
|
517次组卷
|
2卷引用:安徽省名校2020-2021学年高二上学期期中联考文科数学试题
名校
7 . 如图,四棱锥
的底面
是边长为2的菱形,
底面
,
,
,
分别是
,
的中点,
.
![](https://img.xkw.com/dksih/QBM/2020/11/3/2585234914590720/2585659484471296/STEM/35f1798b20074a9b9cf9b3aa2b52fd3f.png?resizew=203)
(1)求四棱锥
的体积;
(2)求
与底面
所成角的正切值.
![](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/9eee296a7d9fba487f1485c61580196f.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602ee324ca5bc3cf9ef251a061b431ab.png)
![](https://img.xkw.com/dksih/QBM/2020/11/3/2585234914590720/2585659484471296/STEM/35f1798b20074a9b9cf9b3aa2b52fd3f.png?resizew=203)
(1)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0bc34d1771fb14c101911660eaa075b.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2020-11-04更新
|
510次组卷
|
5卷引用:安徽省皖北名校2020-2021学年高二上学期第二次联考数学试题
名校
8 . 已知圆锥
的侧面展开图为如图所示的半径为4的半圆,半圆中
.
![](https://img.xkw.com/dksih/QBM/2020/11/3/2585239662804992/2585593955827712/STEM/dda1f4b8393b4a32a5d0cd820761dc66.png?resizew=302)
(1)求圆锥
的体积;
(2)若
是三棱锥
的高,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e5ef91fb27dd684a27ae7f1993cfba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a0e4f5fb69e72884e79b937c02a350c.png)
![](https://img.xkw.com/dksih/QBM/2020/11/3/2585239662804992/2585593955827712/STEM/dda1f4b8393b4a32a5d0cd820761dc66.png?resizew=302)
(1)求圆锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e5ef91fb27dd684a27ae7f1993cfba.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34c157ff302a881c17514534903c575f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a9695287dcbfb6a45403fc794b9c49b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a9695287dcbfb6a45403fc794b9c49b.png)
您最近一年使用:0次
9 . 如图,四边形
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6d81c19ffe75db506cf1b1971ef5c5d.png)
分别在
上,
.现将四边形
折起,使得平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/c63767c3-55b7-4939-a484-a2c97d89231c.png?resizew=362)
(1)当
时,求多面体
与多面体
的体积比;
(2)设
,当
为何值时,多面体
的体积最大?并求出其最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6d81c19ffe75db506cf1b1971ef5c5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/299167e72f7104e497b35e60dbfd0259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af0a51a80a8110a89b88924a790b0b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/666734423f1818d76a74f171b7420b68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c674dc5024374f53920947c4cf4baf11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6240d4cf0fb44aa1e6bdaf2a4bdfb37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/c63767c3-55b7-4939-a484-a2c97d89231c.png?resizew=362)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc90c2d45477e166b02359525f40aa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9186e4574ffe28e673724fcb019db208.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06fcd03374dc5f929f9b438bcc94bdf7.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c29bf5a05dd46f6e03dfd22c32f7ce1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e67ea9fcb645978b03221c2f6019c7d.png)
您最近一年使用:0次
名校
解题方法
10 . 在平行四边形
中,
,
,过A点作
的垂线交
的延长线于点E,
.连结
交
于点F,如图1,将
沿
折起,使得点E到达点P的位置.如图2.
![](https://img.xkw.com/dksih/QBM/2020/10/25/2578660805771264/2580608125911040/STEM/6b7bc48a9d7d4bb1a0721ed37035caec.png?resizew=522)
(Ⅰ)证明:
;
(Ⅱ)若G为
的中点,H为
的中点,且平面
平面
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6166b9a5437671bcba31e17c375eb39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/2020/10/25/2578660805771264/2580608125911040/STEM/6b7bc48a9d7d4bb1a0721ed37035caec.png?resizew=522)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d8455347237248c7701100642c5b119.png)
(Ⅱ)若G为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16b77a5c3865855fbb3d24f9522ced8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48769011a648f0b274a3f1acb8531758.png)
您最近一年使用:0次
2020-10-28更新
|
495次组卷
|
2卷引用:安徽省示范高中培优联盟2020-2021学年高二上学期秋季联赛文科数学试题