Question

Find the exact circumference of the circle shown.

a. 32pi b. 16pi c. 256pi d. 64pi



Answer 1

The circumference is 64
`\pi`


Work

C = 2
`\pi`r
C = 2 *
`\pi` * 32
C = 64
`\pi`

Answer 2

32π which is equal to 100.53

Explanation:

The measurement given in the sketch, refers to the diameter of the circle, not the radius. The formula for the circumference of a circle uses the radius.

The radius,which is half of the diameter, is 16.

Using the formula for circumference:

C = 2πr

C = 2π(16)

C = 32π

C = 100.53