如图,圆的周长为15.7分米,圆的面积是长方形的2/3,图中阴隐部分面积是多少平方分米?4r7z3B9y.l-j;\._5T(}3h*q+_,u
4r7z3B9y.l-j;\._5T(}3h*q+_,u
算式:提示(?5i+N4L3Y4^(Y,c4r7z3B9y.l-j;\._5T(}3h*q+_,u
答: 阴影部分的面积是;o7e,?2T6U1N平方分米。4r7z3B9y.l-j;\._5T(}3h*q+_,u