I'm stuck on this problem. I think the answer is 8 but I'm not sure because I think it could be 16 too... Created by college gurl. science-mathematics-en - mathematics-en

If the area of a circle is 64π square feet, then what is the diameter?

May 2021 3 140 Report

If the area of a circle is 64π square feet, then what is the diameter?

I'm stuck on this problem. I think the answer is 8 but I'm not sure because I think it could be 16 too..

the area of a circle is pir^2

so you get that A=pir^2

64pi=pir^2

64=r^2

r=8

diameter is twice the radius so d=16

How did you solve it?

A = pi*r^2 = 64*pi, so r^2 is 64.

Careful: You were asked for the diameter, not the radius.