Question

The diameter of a circle is 16 inches. What is the area?Give the exact answer in simplest form. _____ square inches. (pi, fraction)

Answer 1

Answer: A=64π in^2

Explanation:

A=area, r=radius, d=diameter

A=πr^2

A=π(d/2)^2 ==> the radius is half of a diameter

A=π(d^2/2^2)

A=π(d^2/4)

A=π(16^2/4) ==> substitute 16 inches for d

A=256π/4

A=64π in^2