Circles - Circumference/Radius/Diameter

What is the diameter?

• 8

• 16

• 10

• 4

What is the circumference?

• 48

• 96

• 24

• 18

What is the radius?

• 18

• 72

• 38

• 14

What is the circumference?

• 36

• 18π

• 108π

• 36π

A bicycle tire has a diameter of 27 inches. What is the radius?

• 27π

• 13.5

• 81

• 25π

What is the diameter?

• 5 in

• 10 in

• 3.14 in

• 15.84 in

A DVD has a diameter of 15 millimeters. Which equation would help you determine the circumference?

• c = 15π

• C = 2π15

• c = 15 ÷ π

• c = 15 π

What is the circumference of a circle with a diameter of 9?

• 81π

• 9π

• 3π

• 6π

What is the diameter?

• 8

• 16

• 10

• 4

What is the radius?

• 18

• 72

• 38

• 14