Question

Circumference of a circle is 18Pi inches. What is the area of the circle?

Answer 1

Answer: 81 pi inches, or around 254.34 inches.

Explanation:

Since the formula for circumference of a circle is 2piR (where R would be the radius), we know that the radius of this circle is 9. From that, we simply need to plug it into the formula for area of a circle: piRsquared. 9 squared is 81, and pi is around 3.14.

Hope this helped.

Answer 2

81pi or 254.34 inches square

Explanation:

18pi = 2pi*r

pi*r = 9pi

r = 9

pi*(9)^2 = 81pi = 254.34 inches square