Question

The circumference of a circle is 15 in. What is the area, in square inches? Express

your answer in terms of π

Answer 1

225/4π

Explanation:

Circumference to diameter formula: divide by π

Therefore, the diameter is 15/π

Diameter to radius formula: divide by 2

Therefore, the radius is 15/2π

Radius to the area of the circle formula: πr^2

Thus, the area of the circle is

π(15/2π)^2 = 225π/(4π^2)

225/4π

I hope this helps!