Change the area s of a circle into a function of the circumference C of a circle

Change the area s of a circle into a function of the circumference C of a circle

Perimeter C = 2 π R
Then radius r = C / (2 π)
Area s = π R ^ 2 = π (C / 2 π) ^ 2 = 1 / 4 π * C

What are the area, perimeter, diameter and radius of a circle in letters

The area is s
The circumference is C
The diameter is d
The radius is r

How to find the diameter and perimeter of a given circle
It's written in letters

Area s
Because s = π R ^ 2
So radius r = √ (s / π)
So the diameter d = 2R = 2 √ (s / π)
Perimeter C = 2 π r = 2 √ (s π)