Question 73981
If the radius of a circle is {{{r}}} then the area of the circle = {{{pi*r^2}}} where {{{pi=22/7 = 3.14}}} approx.


Example:
If the diameter of a circle is 14 cm, then the radius is {{{r=14/2=7}}} cm. The area of the circle = {{{pi*7^2 = (22/7)*7^2 = 22*7 = 154}}} sq. cm.