The circumference of a compact disc is 28.26 centimeters. What is the radius?
r = 4.5 cm
The radius of a circular rug is 4 ft. What is the circumference?
C = 25.12 ft
The circumference of a bicycle wheel is 50.24 in. What is the diameter?
C = 16 in
The diameter of your bicycle wheel is 25 in. How far will you move in one turn of your wheel?
C = 78.5 in
The diameter of a nickel is 2 cm. What is the circumference?
C = 6.28 cm