the circumfrence of a circle is pi times it's radius squared.
18.84
25.1
Pi times radius squared.
22*pi
radius = circumference/(2*pi)
The circumfrence would double Example : C of 5 cm radius circle = 3.14 *2*5 C=3.14 C of 10cm radius circle = 3.14*2*10 C =62.8
two times the radius times pi
The circumfrence is like a perimeter. It is the area around a circle. You can find the circumfrence of a circle by using this formula. Pi x R2 or Pi times the radius squared.
8 divided by (2*pi) = a radius of 1.273239545 linear units
Circumference of a circle = 2*pi*radius or pi*diameter
Circumfrence=diameter X 3.14 (diameter=2 X radius)