Question

The circumference of a circle is 138.16 centimeters. What is the area of the circle?

Answer 1

Circumference formula tells you
`C=2 \pi r`


`C=2 \pi r`

`138.16=2 \pi r`

`21.99= r`

`r=21.99cm`
The formula to find the area of a circle is
`A= \pi r^2`


`A= \pi r^2`

`A= \pi (21.99)^2`

`A= \pi (483.56)`

`A= 1519cm^2`