Question 939329
 formula :  area  = {{{ sqrt(s(s-a)(s-b)(s-c))}}}
   {{{s= (a+b+c)/2}}}
 a= 261 ft
b=200 ft
c= 176 ft
 s= {{{(261+200+176)/2}}}
s  = {{{ 637/2}}}
s=318.5
 area  = {{{ sqrt(318.5(318.5-261)(318.5-200)(318.5-176))}}}
 area = {{{ sqrt(318.5*57.5*118.5*142.5)}}}
  area  = {{{sqrt(309205560.9375)}}}
          = 17585.21 square feet
 Result : Area  = 17585.21 square feet