divide
the circumfrence of a circle is pi times it's radius squared.
radius = circumference/(2*pi)
The circumference (not circumfrence!) is given by the equation C = 2*pi*r where r is the radius. So r = C/(2*pi) where pi is the irrational number that is approx 3.14159 or even more approximately, 3.14.
No. Circumfrence=2 times pi times radius. And since the daimeter = 2 times radius, circumference is diameter times pi.
divide
Circumfrence
the circumfrence of a circle is pi times it's radius squared.
Circumfrence
18.84
The circumference of a circle is (diameter) multiplied by (pi).
pi times diameter
25.1
Pi times radius squared.
22*pi
Circumfrence is the perimeter of a circle, the line that makes a circle looks like a circle Imagine a perfect circle drawn on a piece of paper. Take the length of the line of the circle (by line I mean the part that is actually drawn on the piece of paper the ring) and there, you have the circumfrence. The circumfrence is exactly π times the size of the diameter (if you don't know what those two things are ignore this)
The circumfrence; Pi (or 3.14) times the width across the circle :)