A circle and a square have same area. Therefore, the ratio

A circle and a square have same area. Therefore, the ratio of the side of the square and the radius of the circle is ?

Let the side of the square be 'a' and let the radius of the circle be 'r'
Then, a² = πr²
⇒ a² / r² = π
⇒ a / r = √π
∴ a : r = √π : 1