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两块手帕有多少个直角
更新时间: 2020-11-04 00:00:00  

两块手帕有8个直角,一块手帕有4个直角,所以两块手帕是8个直角。

《几何原本》中的定义:当一条直线和另一条横的直线交成的邻角彼此相等时,这些角的每一个被叫做直角,而且称这一条直线垂直于另一条直线。

关键词: 手帕 多少 直角

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