Answer:
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
