The area of any circle can be determined by using the formula
- A = πr²
- where:
- A is the area of the circle,
- r is the radius of the circle,
- π is a constant, the ratio of any circle's circumference to its diameter, approximately equal to 3.141592653589793238462643383279502884197169399375105820975.
- where:
See also Wikipedia:Area of a disk.