Area of a circle is the region occupied by the circle in a two-dimensional plane. It can be determined easily using a formula, A = πr2

, (Pi r-squared) where r is the radius of

the circle. The unit of area is the square unit, such as m2

, cm2

, etc. Non- routine

problems typically do not have an immediately apparent strategy for solving them. While

in routine problem it can be solve by using formulas, symbols, and operation.​