what the area of a circle if the radius is 5

Answer 1

Using the formula below, substitute the known information.

a=Pi x r^2

a=3.14 x 5^2

a=3.14 x 25

a=78.5

Answer 2

The formula for the area of a circle is r^2*pi.

r radius

pi 3.1415926........ stick with 3.14; the greek letter for "pi" isn't in this program. "Pi" is the cercumference of a 1 segment diameter circle. That's from 1 mm to 1 light-year.