Question

If the circumference of a circle
is 4 pie r what is its area?​

Answer 1

Step-by-step explanation:

Perimeter of a circle is 2πR

Hence,

2πR = 4πr

=>R = 2r

Now you can put this into Area equation A = πR^2

A = π(2r)^2 = 4πr^2

Which is the required answer.

:)