Respuesta :

Since the shape of the polygon is a square, all 4 sides have the exact same length. This means that Perimeter = 4 * length of one side, or;
[tex] P = 4 s\\
20=4s\\
s=\frac{20}{4}=5[/tex]
Thus, the length(value) of S is 5.
The answer is 5 because if you ad 5+5+5+5=20 it equald 20