Question

The area of the circle above is 314 units2. What is the circumference of the circle? use 3.14

Answer 1

`r =\sqrt{(314 units^2)/(3.14)} = 10 units`

And the circumference is given by this formula:

`C = 2\pi r`

And replacing the value fo r we got:

`C = 2\pi *10 units = 62.8 units`

And then the final answer would be 62.8 units for the circumference.

Explanation:

For this case we know that the area for a circle is given by:

`A = \pi r^2`

And we know that
`A = 314 units^2`

We can find the radius from the previous formula like this:

`r^2 = (A)/(\pi)`

`r^2 = (314 units^2)/(\pi)`

`r =\sqrt{(314 units^2)/(3.14)} = 10 units`

And the circumference is given by this formula:

`C = 2\pi r`

And replacing the value fo r we got:

`C = 2\pi *10 units = 62.8 units`

And then the final answer would be 62.8 units for the circumference.