The radius, diameter, or circumference of a circle is given. Find the missing measures. Round to the nearest hundredth if necessary. d = 16.4 mm., r = ? , C = ? a. r = 32.8 mm, C = 25.76 mm c. r = 8.2 mm, C = 51.52 mm b. r = 32.8 mm, C = 51.52 mm d. r = 8.2 mm, C = 25.76 mm