👉 In mathematics, "cosier" is a mathematical term that refers to the area of a circle. It can be defined as the ratio of the circumference of the circle to its diameter.
The formula for calculating the area A of a circle with radius r (r = 2πd) is:
A = π
r^2
Where π (pi) is approximately equal to 3.14159 and d is the diameter of the circle.
Therefore, cosier can