Circumference and Area of Circles Real World

A circular table top has an area of 324 square inches. Which measurement is closest to the radius of the table top in inches?

• 10.2

• 18.0

• 56.5

• 103.1

A large pizza has a diameter of 14 inches. A medium pizza has a diameter of 10 inches. How much larger is the area of the large pizza than the area of the medium pizza? Round your answer to the nearest hundredth of an inch. Use 3.14 for 𝜋.

• 12.56 in²

• 50.24 in²

• 75.36 in²

• 78.50 in²

• 153.86 in²

The circumference of the wheel on Roy's bicycle is 225 in. What would you do to determine the radius of the wheel?

• Divide the circumference by 𝜋.

• Divide the circumference by 𝜋 to find the diameter; then divide the diameter by 2 to find the radius.

• Multiply the circumference by 𝜋.

• Multiply the circumference by 𝜋 to find the diameter; then divide the diameter by 2 to find the radius.

The cost of painting the circular traffic sign is $3.50 per square foot. How much to the nearest dollar, will it cost to paint the sign if it diameter measures 36 inches?

• $20

• $25

• $30

• $35

Mrs. Wilson placed the welcome mat shown below on her front door step. What is the area of her welcome mat in square feet? Round to the nearest tenth.

• A = 36.4 in sq

• A = 50.2 in sq

• A = 31.4 in sq

• A = 25.1 in sq

A ceiling fan is pictured above. The tip of one of the fan blades is labeled point A.  Point A is 28 inches away from the center of the fan. About how far does point A on the fan travel when the fan blades make one full revolution?

• 28 inches

• 56 inches

• 176 inches

• 88 inches

Find the area of the figure shown.

• 1017.36 cm

• 254.34 cm

• 26.52 cm

• 123.65 cm

A cruise ship has a large, circular window. It has a diameter of 6 meters. What is the window's area?

• 31.25 m²

• 29.55 m²

• 30.36 m²

• 28.26 m²

MUST DO: Elsie bought a circular rug that is 9 feet in diameter. What is the circumference of the rug rounded to the nearest tenth of a foot?

• 4.5 feet

• 14.1 feet

• 28.3 feet

• 56.5 feet

what is the circumference of this circle ?

• 3.14 cm 

• 37.68 cm

• 24 cm

• 68.4 cm