Circumference = 2 * radius * pi (where pi is approx = 3.14159)So Radius = Circumference / (2 * pi)
circumference = pi * 2radius (diameter) so to find radius you use circumference/(2 x pi) this will find radius ----
Circumference of a circle = 2*pi*radius or pi*diameter.
Circumference = 2*pi*radius So Radius = Circumference/(2*pi)
two times the radius times pi
To find the circumference of a circle the formula is: 2*pi*radius or diameter*pi
Circumference of a circle = 2*pi*radius
Circumference = 2 x Pi x Radius Radius = Circumference / (2 x Pi).
perimeter (circumference): diameter times pi (3.14) area: radius times radius times pi (3.14) Area = pi*radius squared Circumference = 2*pi*radius or pi*diameter
You simply find the radius, square it and then multiply it by pi. e.g. radius x radiusx pi(3.141592654)
Multiply the radius by 2, and then by pi. pi=3.141592654...
A = pi x radius squared where pi = 3.14