IN THE FIGURE BELOW, IFD AND JED ARE TWO ARCS IN THE CIRCLES WITH...

7. In the figure below, IFD and JED are two arcs in the circles with the same radius. AD = DB = DC = 4 cm. AGDHB, AFC and BEC are straight line segments. IA, FG, CD, EH and JB are perpendicular to AB. Find the area of the shaded region,