Circumference and Area of a Circle

C is 15.5 inches. Diameter is 5 inches. What is the best approximate value of π?

• 5 ÷ 15
• 5 x 15
• 15 ÷ 5
• 15 x 5

Which of the following choices is closest to the area of a circle? (d = 9 cm)

• 253.34 cm²
• 63.59 cm²
• 56.52 cm²
• 28.26 cm²

Tags

CCSS.7.G.B.4

The radius of a circular swimming pool is 6.1 meters. Which is closest to the circumference of this swimming pool?

• 19.48 m
• 74.42 m
• 38.33 m
• 116.90 m

The diameter of a circular pond is 13.7 meters. The circumference is approximately 58.7 meters. Which of these could be used to estimate the value of π?

• d ÷ c = π
• π ÷ c = d
• c ÷ d = π
• d ÷ π = c

The diameter of a circular table is 16 feet. Which of the following represents the number of feet it would take to go around the tabletop?

• π⋅16²
• π⋅16
• 2⋅π⋅16
• π⋅8²

The London Eye has a diameter of 120 meters. If you are sitting in one of the capsules, about how far do you travel in one rotation of the Ferris wheel?

• 180 meters
• ^{380 meters}
• ^{11,300 meters}
• 125 meters

About many steps is the walk around the circular sidewalk?

• 150 steps
• 120 steps
• 300 steps
• 225 steps

How much grass is needed to fill the entire circular lawn?

• 4,418 steps²
• 235 steps²
• 5,625 steps²
• 740 steps²

I want to find out how long I need my string lights to be to decorate my bike. The radius of a tire is 13 inches. How much lighting do I need to decorate both tires?

• 82 inches
• 164 inches
• 530 inches
• 41 inches