The formula for finding the area of any circle is pi*radius2..
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Pi is the number you have to use to solve many circle equations. If you want to find the area of a circle, use radius squared times pi. For the circumference, use diameter times pi.
The area of a circle is pi times (radius squared) Thus if radius is one inch then area is (pi) times (1) times (1) = pi = 3.1416 inches squared
Area=pi times radius squared Circumference=pi times diameter or pi times radius times two
Area of a circle: pi times radius squared Circumference of a circle: 2 times pi times radius or diameter times pi
Pi times radius squared.