Mastering Circle Formulas and Conversions: Grade 5 Quiz

A circular garden has a radius of 4 meters. What is the area of the garden? (Use the formula A = πr²)

• 20π square meters

• 16π square meters

• 12π square meters

• 8π square meters

If the diameter of a pizza is 12 inches, what is the circumference? (Use the formula C = πd)

• 40.84 inches

• 37.68 inches

• 31.42 inches

• 25.12 inches

A round swimming pool has a radius of 5 feet. How many square feet of water are needed to fill it? (Use A = πr²)

• 25 square feet

• 100 square feet

• 78.5 square feet

• 50 square feet

A circular track has a circumference of 400 meters. What is the radius of the track? (Use C = 2πr)

• 100 meters

• 63.66 meters

• 50 meters

• 80 meters

You have a circular table with a diameter of 3 feet. How many square feet of tablecloth do you need to cover it? (Use A = πr²)

• 6.28 square feet

• 7.07 square feet

• 9.42 square feet

• 12.56 square feet

A bicycle wheel has a radius of 14 inches. How far does the bike travel after one complete rotation? (Use C = 2πr)

• 14π inches

• 28 inches

• 28π inches

• 56π inches

A circular fountain has a diameter of 10 meters. Convert the diameter to centimeters.

• 1000 centimeters

• 1500 centimeters

• 200 centimeters

• 500 centimeters

If a circular pizza has a radius of 6 inches, what is its area in square inches? (Use A = πr²)

• 36π

• 18π

• 24π

• 12π

A circular garden has a circumference of 31.4 meters. What is the radius of the garden? (Use C = 2πr)

• 5 meters

• 3 meters

• 10 meters

• 7 meters

You want to paint a circular wall that has a radius of 8 feet. How many square feet will you need to paint? (Use A = πr²)

• 200.96

• 150.72

• 250.48

• 180.96