Circles

Tom has a circular clock with a circumference of 39.88 inches. What is the radius of Tom's clock, to the nearest hundredth of an inch? (Use 3.14 for pi)

• 25.40 inches

• 12.70 inches

• 6.35 inches

• 3.56 Inches

Mario ordered a pizza that had a diameter of 14 in. What is the approximate area of the pizza?

• 22 square inches

• 44 square inches

• 154 square inches

• 616 square inches

What is the approximate area of a circle with a diameter of 6.2 inches?

• 9.7 square inches

• 19.5 square inches

• 30.2 square inches

• 120.8 square inches

Joe made a model of a door out of a piece of cardboard. The amount of cardboard used for the square, bottom portion of the model is shown in the diagram below.

Approximately how much cardboard did he use in all to make the model?

• 828 square inches

• 1,092 square inches

• 1,400 square inches

• 2,016 square inches

The diameter of a tractor’s wheel is 4 ft. Approximately how many complete turns will the wheel make if it travels 64 ft?

• 4

• 5

• 10

• 16

Jack cut out two fabric circles of different sizes in his art class. The larger circle has a circumference of 22 inches, and the smaller circle has a circumference of 14 inches. What is the total area, to the nearest hundredth of a square inch, of the two circles? (Use 3.14 for pi)

• 54.14 square inches

• 29.89 square inches

• 11.47 square inches

• 5.73 square inches

A circle has a circumference of about 54 in. What is the approximate measure of the diameter?

• 25 in

• 17 in

• 7 in

• 54 in

• 150 ft

• 300 ft

• 417 ft

• 942 ft

• 43 square centimeters

• 86 square centimeters

• 100 square centimeters

• 314 square centimeters

• 54

• 68.13

• 72.84

• 82.26