Why area of circle equals 3.14rr?

The area of a circle is calculated using the formula A = πr², where A represents the area and r is the radius. The constant π (pi) is approximately equal to 3.14, which represents the ratio of a circle's circumference to its diameter. This formula arises from the concept that the area can be visualized as the number of square units that can fit within the boundary of the circle, with the radius squared reflecting the scaling of these units as the radius increases.