Circumference and Area

Calculate the circumference of a circle with a radius of 5 units.

• 3π units

• 25 units

• 15π units

• 10π units

Find the area of a circle with a radius of 3.5 units.

• 10.5π

• 12.25π

• 13.5π

• 11.5π

If the radius of a circle is 8 cm, what is its circumference?

• 60.24 cm

• 50.24 cm

• 40.24 cm

• 30.24 cm

A circular swimming pool has a radius of 10 meters. What is the area of the pool?

• 200π square meters

• 100π square meters

• 150π square meters

• 50π square meters

Sara is making a circular garden with a radius of 6 feet. How much fencing does she need to enclose the garden?

• 42.75 feet

• 37.68 feet

• 24.56 feet

• 30.12 feet

The diameter of a circular table is 120 cm. What is the circumference of the table?

• 100.48 cm

• 150.72 cm

• 90.36 cm

• 376.99 cm

What is the area of a circle with a radius of 4.2 units?

• The area of the circle is approximately 40.2 square units.

• The area of the circle is approximately 55.42 square units.

• The area of the circle is exactly 25 square units.

• The area of the circle is approximately 16.8 square units.

If the radius of a circle is 12 inches, what is its circumference?

• 36π inches

• 48π inches

• 60π inches

• 24π inches

A circular pizza has a radius of 14 inches. What is the area of the pizza?

• 615.75 square centimeters

• 879.32 square inches

• 400.25 square inches

• 615.75 square inches

John is painting a circular target with a radius of 9 meters. How much paint does he need to cover the target?

• 18π square meters

• 72π square meters

• 45π square meters

• 81π square meters