If a circle has a circumference of 10piπ cm, what is its area?

Circumference of a circle formula: c=2πr where

c = circumference

r = radius

So here, we have c = 10π.

Divide 10 by 2 and we get a radius of 5; c=2π (5).

Area of a circle formula: a = πr² where

a = area

r = radius

Plug in 5 for radius.

a = (5²) π

a = 25π

a ≈ 78.5398