已知棱长为
的正方体
中,点
在
上运动,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88d8d121df7d35e2a6b53c8df351305f.png)
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更新时间:2023-03-22 18:57:55
|
【知识点】 棱柱的展开图及最短距离问题
相似题推荐
单选题
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适中
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【推荐1】如图长方体中,过同一个顶点的三条棱的长分别为2、4、6,
点为长方体的一个顶点,
点为其所在棱的中点,则沿着长方体的表面从
点到
点的最短距离为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/f48780fa-b7c2-4727-96ee-47e018b4e0aa.png?resizew=194)
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/f48780fa-b7c2-4727-96ee-47e018b4e0aa.png?resizew=194)
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单选题
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适中
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解题方法
【推荐2】在直三棱柱
中,底面
是等腰直角三角形,
,
为侧棱
上的动点,若
的周长的最小值为
,则三棱锥
的外接球的体积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829018a6ca0aff95d89e3f7cd943274e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdd324f113250febd154c16648ac6533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7782200f8eab2b9add12b2a99b6a03b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/861d61d2b7b16e12fd97f870fb3fa522.png)
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