Question

A circle has an area of 78.5 square inches. What is the diameter of the circle?

Answer 1

The formula for the area of a circle is the following:


`A = \pi r^(2)`

where
`A` is the area and
`r` is the radius of the circle. We also know that the diameter of a circle is twice the length of the radius, so you are able to determine the radius using the above formula, and then you can double it to get the diameter.

Answer 2

The diameter is 10 square inches