Circumference Practical Problems

What is the radius of this circle?

• 18 in

• 6 in

• 9 in

• 36 in

Danielle wants to make cookies for 3 friends. The radius of a cookie is 5 inches. If she wants to ice ALL 3 of the cookies, how many square inches of cookies must she cover with icing?

A ball has a circumference of 9.42 cm. What is the diameter?

• 29.5788 cm
• 59.1576 cm
• 3 cm
• 1.5 cm

A cruise ship has a large, circular window. It has a diameter of 6 meters. How many square meters of glass is the window made of? Use 3.14 for pi.

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

What is the distance around the bowl?

• 21.98 cm

• 43.96 cm

• 87.96 cm

• 7 cm

Find the radius of a circle if the area is 201.1 mi²

• 10 mi
• 8mi
• 20 mi
• 5mi

A circular swimming pool has a radius of 15 feet. The family that owns the swimming pool wants to put up a circular fence that is 5 feet away from the pool at all points. What is the circumference of the fence they will need? Hint: Draw what you know.

• 15π

• 20π

• 40π

• 30π

Alex has trained his puppy, Popper, to jump through a ring. According to Alex's measurements and calculations, the ring has a diameter of 3.5 feet. What is the ring's circumference (use 3.14 for pi)?

• 11.32 ft
• 12.25 ft
• 10.99 ft
• 8.75 ft

The stained glass window is a semicircle. What is the distance around the entire window?

The circumference of the moon is the approximate distance around a circle with a radius 1,736 kilometers. Find the circumference of the moon. Use 3.14 for pi and round to the nearest tenth!