Circumference of Circles

Determine the radius of the penny

• 59.66 mm

• 9.5 mm

• 38 mm

• 119.32 mm

Diameter 32 inches
What is the radius?

• 16 inches

• 64 inches

• 96 inches
  96 inches

• 16 ft 

Daniel wants to buy cookies for her friend. The
radius of a cookie is 5 inches. What is the cookie’s 
circumference?

• 10 in

• 2.5 in

• 15.7 in

• 31.4 in 

What is the radius?

• 18

• 72

• 38

• 14

The diameter of a circle is 3 centimeters. What is the circumference?

• 11.5cm

• 9.42 cm

• unicorns are narwahls

• 45.3 cm

What is the diameter?

• 8

• 16

• 10

• 4

Steven purchases a bowl. The diameter of the
bowl is 14 cm. What is the circumference of the 
bowl?

• 28 cm

• 43.98 cm

• 87.96 cm

• 7 cm

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

• c = 15π

• C = 2π15

• c = 15/π

• c = 15/2π

Find the circumference (round to the nearest hundredth).

• 14.13 cm

• 26.28 cm

• 28.26 cm

• 56.52 cm

Find the circumference (round to the nearest hundredth).

• 2.16 m

• 2.61 m

• 4.02 m

• 4.08 m