Area and circumference of circles

A bicycle tire has a diameter of 27 inches. How far does the bike travel along the ground when the wheel rotates once? (HINT: Find the circumference)

• 85in

• 15.5in

• 27in

• 13in

A DVD has a diameter of 15 millimeters. Which equation would help you determine the circumference?

• c = 15π

• C = 2π15

• c = 15 ÷ π

• c = 15 + π

Steven purchases a bowl. The diameter of the
bowl is 14 cm. What is the circumference of the 
bowl?

• 28 cm
• 43.98 cm
• 87.96 cm
• 7 cm

Tags

CCSS.7.G.B.4

Daniel wants to buy cookies for her friend. The
radius of a cookie is 5 inches. What is the cookie’s 
circumference?

• 10 in
• 2.5 in
• 15.7 in
• 31.4 in 

Tags

CCSS.7.G.B.4

What is the circumference of this circle?

• 3.14 cm 
• 37.7 cm
• 24 cm
• 68.4 cm

Tags

CCSS.7.G.B.4

Find the area of the circle

• 56.52
• 254.34
• 1017.36
• 113.04

Tags

CCSS.7.G.B.4

A remodeling project calls for sanding a chair with a disk sander. The sanding disk used on the sander has a radius of 4.5 inches. Find the area of the disk.

• about 64.79 in²

• about 55.19 in²

• about 63.59 in²

• about 53.79 in²

Gregory want to fertilize and fence a circular vegetable garden. The diameter of the vegetable garden is 50 meters. How many square meters will need to be fertilized? (HINT: Find the area.)

• 1,963 square meters

• 7,850 square meters

• 157 square meters

• 1,157 square meters

A lawn sprinkler sprays water 5 feet in every direction as it rotates. Where the sprinkler sits is the middle. What is the area of the sprinkled lawn?

• 31.4 square feet

• 15.7 square feet

• 19.63 square feet

• 78.5 square feet

If the circumference of a circle is approximately 90in, what is the diameter?

• 10.6in

• 5.3in

• 28.7in

• 14.3in