Find Circumference

The diameter of circle X is 15 centimeters. The diameter of circle y is 20 centimeters.

Which measurement is closest to the difference between the circumference of circle x and the circumference of circle y in centimeters?

• 15.7 cm

• 7.85 cm

• 137 cm

• 31.4 cm

• The ratio of the circumference of a circle to its diameter

• The ratio of the circumference of a circle to its radius

• The radius of a circle times 2 times 3.14

• The diameter of a circle times 2 times 3.14

What is the circumference?

• 48

• 96

• 24

• 18

What is the circumference?

• 36

• 18pi

• 108pi

• 36pi

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

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 

A circular swimming pool is 21 feet in diameter. What is the circumference of the pool?

• 10.5 ft

• 42 ft

• 65.97 ft

• 131.95 ft

Find the circumference of a circle with a radius of 12.5 mm.

• 37.68mm

• 18.84mm

• 78.54mm

• none of the above

Find the circumference (to the nearest whole number)

• 88 in

• 44 in

• 116 square in

• None of the above

What does "circumference" mean?

• Space a circle takes up

• Distance around a circle

• Line from one side of a circle to another

• Line from center of circle to side