Question

The diameter of a circle measures 8 cm. What is the circumference of the circle?

Use 3.14 for it, and do not round your answer. Be sure to include the correct unit in your answer.

Answer 1

16π or 50.266

Explanation:

Circumference formula is just 2πr ,and the radius is 8, so just sub into the formula

Answer 2

Answer: 25.12 cm

Explanation:

The formula for the circumference of a circle is
`2\pi r`, when r = the radius.

Diameter = 2 x radius = 8 cm. Therefore, the radius = 4 cm.

Plug r = 4 cm in to the circumference formula:
`2\pi (4)` = 8 x 3.14 = 25.12 cm.