Question 255992
In words:
perimeter = area x some conversion factor, x
Let {{{r}}} = radius
perimeter = {{{2*pi*r}}}
area = {{{pi*r^2}}}
{{{2*pi*r = (pi*r^2)*x}}}
Divide both sides by {{{pi*r}}}
{{{2 = r*x}}}
{{{x = 2/r}}}
perimeter = A x 2/r