Match each circumference to the corresponding radius or diameter of the circle. (All circumferences are approximate.) Tiles circumference: 34.54 units circumference: 59.66 units circumference: 23.236 units circumference: 26.376 units circumference: 13.188 units circumference: 29.83 units Pairs radius: 4.2 units diameter: 7.4 units diameter: 11 units radius: 9.5 units
We solve for the diameters of radius of the given circles by using the equation, C = πD or C = 2πr where D and r are diameter and radius, respectively.
Solving, C = 34.54 units D = C/π = 34.54 units / 3.14 = 11 units r = C / 2π = 34.54 units/2(3.14) = 5.5 units
C = 59.66 units D = C/π = 59.66 units/3.14 = 19 units r = D2 = 9.5 units C = 23.236 units D = 23.236 units/3.14 = 7.4 units r = D/2 = 3.7 units C = 23.376 units D = 23.376 units / 3.14 = 7.4 units r = D/2 = 3.7 units C = 13.188 units D = 13.188 units/3.14 = 4.2 units r = D/2 = 2.1 units
