20-21高一下·浙江·期末
名校
1 . 如图,在棱长为
的正方体
中,
点是
的中点.
![](https://img.xkw.com/dksih/QBM/2021/6/2/2734570351747072/2734863987220480/STEM/a76772f9-52d8-4949-bd00-06a17d7c292d.png?resizew=211)
(1)证明:
平面
;
(2)求三棱锥
外接球的表面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.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/22adbc0da438220f9cace11b629d799b.png)
![](https://img.xkw.com/dksih/QBM/2021/6/2/2734570351747072/2734863987220480/STEM/a76772f9-52d8-4949-bd00-06a17d7c292d.png?resizew=211)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60426d3c6f8c8bde775914fa9f0a7fe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81bf7a859123936a07193592e089340a.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61df721e926fddc37c15a341e4559a28.png)
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2021-06-03更新
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3卷引用:山西省阳泉市第一中学校2023-2024学年高二上学期开学分班数学试题
山西省阳泉市第一中学校2023-2024学年高二上学期开学分班数学试题(已下线)【新东方】高中数学20210527-021【2021】【高一下】新疆维吾尔自治区2022-2023学年高一下学期期末考试数学试题