围成的圆的面积大 S正方形=(31.4/4)(31.4/4)=61.225m^2 S圆=3.14*[31.4/(2*3.14)]*[31.4/(2*3.14)] =78.5m^2 78.5m^2>61.225m^2 所以围成的圆的面积大
正方形面积达
圆大
正方形:31.4÷4=7.85,7.85×7.85=61
