r=7.9

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=7.9 into the formula for the area of a circle. Pi π is approximately equal to 3.14.

π⋅7.92

Raise 7.9 to the power of 2.

π⋅62.41

Multiply π by 62.41.

196.06679751

Find the Area circle (7.9)