Question 379423
The diagonal of a square is {{{sqrt(2)}}} times the length of a side...or
{{{d = s* sqrt(2)}}}
The perimeter is merely four times a side...so
{{{s = d / sqrt(2)}}}
{{{s = 12/sqrt(2)}}}
{{{s = 6*sqrt(2)}}}
and
{{{P = 4*s = 24*sqrt(2)}}}