Each of the four semicircles shown in the figure has a side of the square as its diameter and has exactly one point in common with the larger circle. If each side of the square has length 4,what is the sum of the areas of the shaded regions?
Each of the four semicircles shown in the figure has a side of the square as its diameter and has exactly one point in common with the larger circle. If each side of the square has length 4,what is the sum of the areas of the shaded regions?