The perimeter of given square is 4(s + 3)
Given that:
One side of square has length = (s+3)
A square is a geometric figure having 4 equal straight sides and all internal angles are of 90 degrees.
Perimeter of a closed figure is a measure of length of all the lines needed to construct that figure.
Perimeter of square of side a is thus a + a + a + a = 4a.
Here given is a = (s+3)
Thus perimeter of given square with side (s+3) is 4(s+3).
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