Circumference

What is the formula for finding the circumference of a circle?

• C = r²

• C = rd

• A = π·r²

• C = π·d

What is the circumference of this circle?

• 3.14 cm 

• 37.7 cm

• 24 cm

• 68.4 cm

Find the circumference of the circle.

• 31.4 cm

• 78.5 cm

• 314 cm

• 15.7 cm

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

• 31.4 cm

• 62.8 cm

• 15.7 cm

• 28.26 cm

The distance around the outside of a 2D figure

• Surface Area

• Area

• Perimeter

• Volume

Find the circumference of the circle. Use 3.14 for π.

• 63.585 in²

• 28.26 in

• 14.13 in

• 4.5 in

Challenge: The radius of the circle is 9 meters. What is the circle's circumference?

• 9 meters

• 28.26 meters

• 56.52 meters

• 18 meters

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

Does this picture show the diameter or radius of a circle?

• Diameter

• Radius