area = pi*r2 where pi is the irrational number approximated by 3.14159
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Pi and the radius can be used to find the area (PiR^2) or the circumference (2RPi) of a circle, where R is the radius.
It depends on the relationship between the rectangle and the circles.
The area of a circle is pi times the square of the radius. Pi has no relationship with the area of a polygon.
The area of a circle is defined by the equation A = πr^2 where π = pi (3.14...) A = Area r^2 = radius squared So, the radius of a circle squared multiplied by pi equals the area.
surface area is the area of a 3D object radius is half of the diameter of a circle