第一题:求面积的题目(π=3.14)
(1)S=(1/4)πd^2=16 π=50.24;
(2)S=C^2/(16π) = 354.9456/(16π) = 7.065
第二题:
圆的周长:C=2πd=2*3.14*65.2=409.456(m)
圆的面积:S=(1/4)πd^2=(1/4)*3.14*(65.2)^2= 3337.0664 (m^2)
第一题:求面积的题目(π=3.14)
(1)S=(1/4)πd^2=16 π=50.24;
(2)S=C^2/(16π) = 354.9456/(16π) = 7.065
第二题:
圆的周长:C=2πd=2*3.14*65.2=409.456(m)
圆的面积:S=(1/4)πd^2=(1/4)*3.14*(65.2)^2= 3337.0664 (m^2)