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9根火柴怎样摆成5个等边三角形
更新时间: 2020-07-09 00:00:00  

先用五根火柴摆出一个平行四边形(两个三角形组合),再在其一个边通过两个火柴摆成一个等腰梯形,最后将两根火柴与等腰梯形的上边组成一个三角形,这样一共有四个小三角形加上整个图形围成的大的等边三角形,一共是五个等边三角形。

关键词: 火柴 怎样 三角形

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