Circumference of Circles Applications

What does d represent in the formula:

C = π·d

• diameter

• radius

• pi

• 3.14

What is the circumference of a circle?

• the distance around a circle

• the area of a circle

• halfway through a circle

• a line through the center of a circle

What number represents π?

• 31.4

• 4.13

• 3.14

• 34.1

Find the circumference of the circle.

• 31.4 cm

• 78.5 cm

• 314 cm

• 15.7 cm

Find the circumference of the circle.

• 78.5 cm

• 15.7 cm

• 7.85 cm

• 19.6 cm

Find the circumference of the circle.

• 18.8 cm

• 113 cm

• 37.7 cm

• 452.2 cm

what is the circumference of this circle ?

• 3.14 cm 

• 37.68 cm

• 24 cm

• 68.4 cm

If the diameter of a circle is 65 m, what is the circumference?

• 204.1 m

• 20.41 m

• 102.05 m

• 102.5 m

If my radius is 2 yd what is the circumference?

• 4 yd

• 1 yd

• 12.56 yd

• 6.28 yd

If my diameter is 90cm, what is my circumference?

• 282.6cm

• 180 cm

• 90cm

• 565.2cm