WhiteArea.java
package shapes;

public class WhiteArea {
    private static double face_Area(SSquare Dice, int face){
        SCircle dots = new SCircle(0.75/8);
        double face_Area = Dice.area() - face *dots.area();
        return face_Area;
    }


    public static void main(String[]args){
        SSquare dice = new SSquare(0.75);
        double dice_Area = face_Area(dice, 1) + face_Area(dice, 2) +face_Area(dice, 3)+face_Area(dice, 4)+face_Area(dice, 5)+face_Area(dice, 6);
        System.out.println(dice_Area);
    }
}

Demo

2.7951552621792275
Process finished with exit code 0