Question

If the area of a circle is 121pie square units, what is the diameter

Answer 1

Since you are given the area, we can solve for radius with this equation:

`A_c = \pi r^2`

`r = \sqrt{ (A_c)/( \pi ) } = \sqrt{ (121 \pi )/( \pi ) } = √(121) = 11`

The radius is 11, so the diameter must be 2 times that, which is 22. With the correct units, the answer is 22 units²