Circumference, Area, Pi

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• B

• C

• D

• A

• B

• C

• D

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• B

• C

• D

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• B

• C

• D

What is pi used to find? 

• the perimeter of a square

• the area of a rectangle

• radius of a circle

• circumference of a circle

Find the circumference of the circle.

• 18.8 cm

• 113 cm

• 37.7 cm

• 452.2 cm

If the circumference of a circle is 62.8 meters, what is the diameter of the circle? Use 3.14 for pi.

• 10 meters

• 20 meters

• 31.4 meters

• 40 meters

The equation C = πd, is used to find the circumference of a circle given it's diameter. This formula can be rearranged to solve for pi. Which equation is written correctly to solve for pi?

• π = Cd

• π = C ÷ d

• π = d ÷ c

• π = C - d

Find the circumference of the circle.

• 78.5 cm

• 15.7 cm

• 7.85 cm

• 19.6 cm

Find the circumference of the circle.

• 31.4 cm

• 78.5 cm

• 314 cm

• 15.7 cm