在平行四边形
中,
,沿
将
折起,则三棱锥
的体积最大时,三棱锥
外接球的表面积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee58ce6fc99dab86a21e8d72bd6bd193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
更新时间:2024-06-18 12:49:51
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解题方法
【推荐1】在正四棱锥
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,
,则该四棱锥内切球的表面积是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4db3940f180ba6947c2edcfaf4431e42.png)
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解题方法
【推荐2】已知四棱锥
中,底面四边形
为正方形,侧面
为正三角形,且侧面
垂直底面
,若
,则该四棱锥外接球的表面积为________ .
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【推荐1】在三棱锥
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【推荐2】现有一个高为
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