hi guji, the area of the circle ( not the curve) would be 1.5 X1.5 X 3.14 square cm where 3.14 is the calue of pi and the radius of the circle made by sticking the pen inside the circle and then adhering the disc to circumference of the circle. however, if the circle (curve) is made without adhering the disc to the bigger circle, then the radius simply would be 3.14 X 0.5X0.5 square cm.