Mastering Area & Circumference: Radius vs. Diameter

A circular garden has a radius of 5 meters. What is the area of the garden? (Use the formula A = πr²)

• 20π square meters

• 30π square meters

• 15π square meters

• 25π square meters

The diameter of a pizza is 12 inches. What is the circumference of the pizza? (Use the formula C = πd)

• 25.12 inches

• 31.42 inches

• 37.68 inches

• 40.84 inches

A circular swimming pool has a radius of 10 feet. How much water can it hold if the depth is 4 feet? (Calculate the volume using the area of the base)

• 1000 cubic feet

• 1500 cubic feet

• 800 cubic feet

• 1256 cubic feet

If a circular track has a circumference of 400 meters, what is the radius of the track? (Use the formula C = 2πr)

• 80 meters

• 63.66 meters

• 50 meters

• 100 meters

A round table has a diameter of 1.5 meters. What is the area of the tabletop? (Use the formula A = πr²)

• 3.1416 square meters

• 2.3562 square meters

• 1.2566 square meters

• 1.7671 square meters

A bicycle wheel has a radius of 0.35 meters. How far does the bicycle travel in one complete rotation of the wheel? (Calculate the circumference)

• 2.50 meters

• 2.199 meters

• 1.75 meters

• 3.14 meters

A circular fountain has a radius of 3 meters. If you want to put a border around it, how long will the border need to be? (Calculate the circumference)

• 25.13 meters

• 18.85 meters

• 12.56 meters

• 15.70 meters

The diameter of a hula hoop is 80 cm. What is the area of the hula hoop? (Use the formula A = πr²)

• 7850 cm²

• 5026.55 cm²

• 6283.19 cm²

• 4000 cm²

A circular pizza has a radius of 8 inches. If you cut it into 8 equal slices, what is the area of one slice? (Calculate the area and divide by 8)

• 2π square inches

• 8π square inches

• 4π square inches

• 16π square inches

A circular clock has a diameter of 30 cm. What is the circumference of the clock? (Use the formula C = πd)

• 75.5 cm

• 94.25 cm

• 100 cm

• 60 cm