题目
大圆与小圆的周长比为3:2,小圆面积是大圆面积的( )
提问时间：2020-08-07
答案
周长比等于半径比=3:2,面积比是半径比的平方是9 ：4
所以小圆面积是大圆面积的( 4/9)
所以小圆面积是大圆面积的( 4/9)
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