Area of Circles

A circle pool has a radius of 7.5 ft. Monica wants to know how many ft of a pool cover she needs to buy?

• 23.55 ft²

• 176.63 ft²

• 47.1 ft²

• 706.5 ft²

Alex has trained his puppy, Zoey, 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 diameter of a quarter is 24.26 mm. What is closest to the circumference of the outer edge of the quarter? Use 3.14 for Pi.

• 76.18 mm

• 38.01 mm

• 463 mm

• 1,848 mm

The diameter of the wheel on a bicycle is 24 inches. Which is closest to the circumference of the wheel?

• 25.36 in

• 37.68 in

• 75.36 in

• 452.16 in

Wyatt notices that a local pizza parlor is running a special on their 16'' supreme thin crust pizza with no crust around the outer edge. If Wyatt orders 3 pizzas, what would he total area of the three pizzas be?

• 201.1 square inches

• 2,412.7 square inches

• 75.4 square inches

• 603.2 square inches

The Ferris wheel has a diameter of 120 meters. If you are sitting in one of the capsules/seats, about how far would you travel in one rotation around the Ferris wheel?

• 180 meters

• ^{380 meters}

• ^{11,300 meters}

• 125 meters

What is the area of a circle?

• The distance around a circle.

• The space inside the circle.

• A line from side to side passing through the center.

• A line from the center to the side.

What is the formula for finding the area of a circle?

• A = π·d

• C = 2·π·r

• A = π·r²

• C = π·d

find the area of the circle with radius 3 cm below.

• 100 cm²

• 225 cm²

• 9 cm²

• 28.26 cm²

What does r represent in the formula:

A = π·r²

• circumference

• radius

• diameter

• squared