Question 1100634
Not precisely what you mean.
The side length OPPOSITE of angle 2  is  57 feet; and the side length OPPOSITE angle 1 is 70 feet.


Measure of angle 3 is  {{{180-79-53=highlight_green(48)}}} degrees.


Now what you really need to find is the side length opposite of angle number 3, for which you can now use Law Of Cosines.  Call this length, x.


{{{57^2+70^2-2*57*70*cos(48)=x^2}}}


{{{x=sqrt(57^2+70^2-2*57*70*cos(48))}}}


The total amount of fencing will be  {{{57+70+x}}}.