Answer:
504 [tex]in^{2}[/tex]
Step-by-step explanation:
area of the square -> 14*14 = 196
area of one of the triangles -> 1/2(11*14) = 77
area of all four triangles -> 77 * 4 = 308
surface area = area of square + area of four triangles
= 196 + 308
= 504
