如图所示,在直三棱柱
中,
,
,
.
(1)求三棱柱
的表面积
;
(2)求异面直线
与
所成角的大小(结果用反三角函数表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df209c58c4cc146ef62100e6d3b068d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af260e0d98c95d1e092dc4c6d348e3ea.png)
(1)求三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2012/1/12/1570689469874176/1570689475338240/STEM/996371ca389647af851d8683a8cb41af.png?resizew=182)
2012·上海嘉定·一模 查看更多[2]
更新时间:2016-12-01 13:18:49
|
相似题推荐
【推荐1】如图,在直三棱柱
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/ea3e648b-b4ec-44d5-b83b-e796b569c885.png?resizew=145)
(1)求三棱柱
的表面积S;
(2)求异面直线
与AC所成角的大小(结果用反三角函数表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df209c58c4cc146ef62100e6d3b068d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2f39d3fcb1664705228e683c2cc3b1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/ea3e648b-b4ec-44d5-b83b-e796b569c885.png?resizew=145)
(1)求三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
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解题方法
【推荐2】图①是高桥中学的校门,它由上部屋顶,和下部两根立柱组成,如图②,屋顶由四坡屋面构成,其中前后两坡屋面
和
是全等的等腰梯形,左右两坡屋面
和
是全等的三角形.点
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和
上的射影分别为H、M,已知
,
,梯形
的面积是
面积的4倍,设
.
的函数关系式;
(2)已知上部屋顶造价与屋顶面积成正比,比例系数为
(
为正的常数),下部两根立柱的总造价与其单根的高度成正比,比例系数为
,假设校门的总高度为3m,试问,当
为何值时,校门的总造价(上部屋顶和下部两根立柱)最低?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2194add18a7df1a23cf1554dc2da1b40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e51817ee1ebf17c73ed21171bcfc5b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(2)已知上部屋顶造价与屋顶面积成正比,比例系数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5631bc01b998a4b3fabd9e131699dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
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【推荐1】已知一个圆锥的底面半径为
,高为
,在其内部有一个高为
的内接圆柱.
(1)求此圆柱的侧面积的表达式.
(2)当
为何值时,圆柱的侧面积最大?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)求此圆柱的侧面积的表达式.
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐2】已知正四棱柱
的底面边长为3,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/0751e97f-a93a-421f-ac7b-8f538ef47dfe.png?resizew=158)
(1)求该正四棱柱的侧面积与体积;
(2)若E为线段
的中点,求BE与平面ABCD所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dff509c6b6890ca2d72b1bb7ae2dead4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/0751e97f-a93a-421f-ac7b-8f538ef47dfe.png?resizew=158)
(1)求该正四棱柱的侧面积与体积;
(2)若E为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
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解题方法
【推荐1】在矩形
中,
,
,矩形
绕
旋转形成一个圆柱,如图所示,矩形
绕
顺时针旋转
至
,线段
的中点为
,求异面直线
与
所成角的大小(结果用反三角函数值表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679748eab882a6be0fefd2cc300349a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/2021/11/6/2845039488245760/2849122820603904/STEM/01f272b6-2e5a-4bd0-b59b-f89dd5814934.png?resizew=210)
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【推荐2】如图,已知直四棱柱
中,
,底面
是直角梯形,
是直角,
,求异面直线
与
所成角的大小.(结果用反三角函数值表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/17/20432952-914b-4ea9-893d-ef029ff969cd.png?resizew=169)
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