A = π(r)²
√(A/π)=r
C = 2π(r)
C = 2π(√(A/π)) ■
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Circumference is: 2 × π × r (or π × d)Area is: π × r²I don't believe that one can really be said to help develop the other.
The formula for the circumference of a circle is the same, whatever its diameter. Circumference = pi*diameter.
Formula of Circumference of a circle: 3.14*Diameter of the circle. You could also do: 3.14*3.14*radius.
The formula; 2 * Pi * Radius = circumference Will calculate the circumference of a circle.
Circumference of a circle = 2*pi*radius