Question

Ellus
Find the radius of this circle.
A = r2
= [?] ft
A = 97ft2
r =

Answer 1

r = 3ft so the ? = 3

Explanation:

We know that the area of a circle is equal to π
`r^(2)` where r is the radius of the circle. Therefore we just have to solve the following equation...

π
`r^(2)` = 9π
`ft^(2)`

`r^(2) = 9ft^(2) \\r = 3ft`