Question

What is the area of a circle whose circumference is 8?

Answer 1

Circumference of a circle= 2πr
Area of a circle=πr^2
2πr=8
r= 8/2π
A= π*8/2π

Answer 2

Answer: A = 5.09

Explanation:

A=πr2

C=2πr

Solving for A

A=C2

4π=82

4·π≈5.09296