r=2cm

The area of a circle is equal to Pi π times the radius r squared.

π⋅(radius)2

Substitute in the value of the radius r=2 into the formula for the area of a circle. Pi π is approximately equal to 3.14.

π⋅22

Raise 2 to the power of 2.

π⋅4

Move 4 to the left of π.

4π(cm)2

Find the Area circle (2cm)