Circumference, Area, and Volume

A roll of tape has a diameter of 7 inches. What is its circumference? Use 3.14 for π.

• C = 7 inches

• C = 2.22 inches

• C = 21.98 inches

• C = 43.96 inches

A basketball poster has a circumference of 415.5 centimeters. What is its radius? Use 3.14 for π.

• C = 132.32 cm

• C = 66.16 cm

• C= 100 cm

• C = 4.15 cm

A pizza has a radius of 16.7 cm. What is the total area of the pizza covered by cheese? Use 3.14 for 𝝿.

The wheels on a car have a diameter of 28 inches. How many full revolutions will the car make in 200 feet?

• 25 revolutions

• 27 revolutions

• 7 revolutions

• 53 revolutions

Ravi is building a round table with a radius of 2.5 feet. The wood costs $32 per square foot How much will it cost for Ravi to make the table? Use 3.14 for pi.

• $628.00

• $7.85

• $251.20

Does this picture show the diameter or radius of a circle?

• Diameter
• Radius

To find the circumference of the circle, which should I use?

• 12 x 3.14

• 12 x 3.14 x 2

What is the diameter of this circle?

• 7 cm

• 10 cm

• 14 cm

• 21 cm

What is the radius of this circle?

• 9 in

• 18 in

• 12 in

• 27 in

I wrapped a tape measure around the trunk of the tree and it was 10 feet. What is the diameter of the tree? Use 3.14 for pi. Round to the nearest hundredth.

• 1.59 ft

• 31.4 ft

• 3.18 ft

• 10.11 ft