Question

A circle has an area of 324╥ cm². What is the radius?

Answer 1

The area of a circle has the formula A = pi * r^2. Since the area is known, we could determine the radius of the circle.

A = pi*r^2
324*pi = pi*r^2
324 = r^2
r = square root (324)
r = 18

The answer is 18 cm.

Answer 2

I got 18 x 18 = 324.