How to find the area of a circle with circumference?
Answer: The area of a circle = C²/4π where 'C' is the circumference of the circle
Let us see how we arrive at this equation
C = 2πr
⇒ C² = 4π²r²
⇒ C² = πr² × 4π = 4π × (A)
⇒ Area of the circle (A) = C²/4π