9 A B NOT TO SCALE D C Points A, B, C and D lie on a circle. ABCD is a square with area 72cm2. Calculate the area of the circle. Give your answer as a multiple of r. .......................................... cm2 [3] 3 M SIHT NI ETIRW TON OD NIGRAM SIHT NI ETIRW TON OD NIGRAM SIHT NI ETIRW TON OD