Answer:52 ft.
Step-by-step explanation: If the area of the base of the pyramid is 
169
ft
2
 then each side of the base is 
13
ft
 long because the base of the pyramid is a square.
Length of the side, 
s
=
√
169
=
13
 
Iif we take the area of a square 
A
=
s
2
 where 
s
=
13
 we get the area of the base to be 
169
ft
2
 thus proving that each side of the base is 
13
ft
 long.
So to find the perimeter of the base of the pyramid we use the formula:
P
=
4
s
 where 
s
=
13
ft
 and thus,
p
=
4
⋅
13
ft
=
52
ft