多边形对角线公式为n(n-3)/2
27条对角线应是9边形
已知四边形有2条对角线,五边形有五条对角线,六边形有九条对角线,那么27条对角线的多边形的边数是多少?
已知四边形有2条对角线,五边形有五条对角线,六边形有九条对角线,那么27条对角线的多边形的边数是多少?
数学人气:809 ℃时间:2020-04-02 12:53:49
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