Question 149290
{{{C=2pi*r}}} Start with the circumference of a circle formula.



{{{12pi=2pi*r}}} Plug in {{{C=12pi}}}



{{{(12pi)/(2pi)=r}}} Divide both sides by {{{2pi}}}



{{{r=6}}} Simplify.



So the radius is 6 meters and the diameter is 12 meters (simply double the radius to get the diameter).