Question

The circumstanc of a circle is 4 pai.Find the area of the circle​

Answer 1

Answer:

As you can see ,

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

Answer 2

Answer:

same answer that she did before lol lol lol