Question

The radius of a circle is 18 miles. What is the area of a sector bounded by a 72° arc?Give the exact answer in simplest form. ____ square miles. (pi, fraction,)

Answer 1

Area = (π*r^2*α)/360°

α =72°

r = 9 mi

Then

A = (π * 81 * 72°)/360° = 81/5π square meters