The diameter of a circle is 8 inches. what us the area

A = 1/4 * (pi) * d^2
A = 1/4 * (pi) * 8^2
A = 1/4 * (pi) * 64
A = 1/4(64) * (pi)
A = 64/4 * (pi)
A = 16 (pi) in^2
Your answer is 16 pi in^2
~Silver

The area formula for a circle is .
So, if we know the diameter of the circle, we can divide the diameter by 2 to get r (radius).

A =  =  = 16 inches squared.

Hope I could help you out!
Have a good one, and God bless you!