A=64πm^2, find circumference, answer in terms of pi

16π

Step-by-step explanation:

Circumference = 2πr. Since the radius, r, is unknown, we can get it from the area.

Area = πr² = 64π;

Divide both sides by π. We are left with

r² = 64; To find r, take square root of both sides

Therefore, r = √64 = 8m;

Circumference = 2*π*8 = 16πm