Measurement the Circumference

Which expression could be used to find the approximate circumference of this quilt piece?

• 2π16

• 2π8

• 2(8)

• 2(4)

A DVD has a diameter of 15 millimeters. What is the circumference?

• c = 15π

• C = 2π15

• c = 15/π

• c = 15/2π

A circular swimming pool is 21 feet in diameter.
How many feet around is the pool?

• 10.5 ft

• 42 ft

• 65.94 ft

• 131.95 ft

The local rodeo has a circular pin, with a diameter of 48 feet, in which they keep the horses. What is the circumference of the horse pin?

• 150.72 feet

• 140.72 feet

• 130.72 feet

• 160.72 feet

The homeowners association wants to enclose the playground in a fence. So they need to figure out how much fencing will they need to purchase. Is this question finding the area or the circumference of a circle?

• area

• circumference

• neither

What does "circumference" mean?

• Space a circle takes up

• Distance around a circle

• Line from one side of a circle to another

• Line from center of circle to side

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

• 28 cm

• 43.96 cm

• 87.96 cm

• 7 cm

Find the circumference of a circle with a radius of 13.5 mm.

• 37.68mm

• 18.84mm

• 84.78 mm

• none of the above

What two formulas can you use to find the circumference?

• C = π·d

• C = π·r²

• C = 2·π·r

• C = d²

If you divide the circumference of a circle by its diameter, what answer will you always get?

• The radius

• The area

• Pi

• cake