It is very easy to calculate the area of the whole circle and divide it by 4.The area of the whole circle can be calculated using the formula A = pir2, where r is the radius of the circle and pi has a value of 3.1415 (can approximate this to 3.14). If using a calculator just input the real value of pi and approximate to the correct number of decimal points (in this case, 2).The area of the circle will be A = 3.1462=3.14*36=113.04 cm2The area of the quarter circle will be Aqc= 113.04/4 =28.26 cm2