Area and Circumference of Circles

Front

A circle has a diameter of 4.5 cm. A larger circle has a diameter of 24 cm. What is the approximate difference in the circumferences of the two circles?

Back

61 cm

Front

The circumference of a circle is 188 meters. What is the approximate radius of the circle?

Back

30 meters

Front

Sadie has 38 inches of fringe to sew around a circular pillow. What is the approximate diameter of the largest pillow she can use?

Back

12 inches

Front

A circular track with a diameter of 60 meters. Shaleah walked around the track 4 times. Approximately how many meters did she walk?

Back

754

Front

A circular table top has an area of 324 square inches. What is the radius in inches?

Back

10.2

Front

A farmer grows potatoes on a circular plot of land with a radius of 20 meters. Each potato plant requires 2 square meters of soil. What is the maximum number of potato plants the farmer can grow?

Back

628

Front

What is the area of a circular disk with a diameter of 6 cm? Use 3.14 for 𝜋.

Back

28.26 cm²

Front

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.

Back

75.36 in²

Front

What would you do to determine the radius of a wheel with a circumference of 225 in.?

Back

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

Front

Jayne has a circular lollipop with a circumference of 25.12 inches. What is the area?

Back

50.24 in.²