Question

A circle measures 12 feet in diameter. What’s its area to the nearest foot?

Answer 1

A of a circle is A=(pi)r^2
A=(pi)(6)^2
\[A\approx113 ft^2\]

Answer 2

A=pi*r^2
A=pi*(d/2)^2
A=pi*(12/2)^2
A=pi*(6)^2
A=pi*36
A=36pi