天气预报 > 其他 > 边长是一千米的正方形面积是多少
边长是一千米的正方形面积是多少
更新时间: 2020-07-11 00:00:00  

这是课本上的一个定义,边长1千米的正方形面积是1平方千米。

关键词: 千米 正方形 面积 多少

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