5 cm + 5 cm + 5 cm + 5 cm
or
10 cm + 10 cm
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Assuming by "equal" you mean that each side is 5 cm, then the perimeter of a square is 5 cm * 4 (sides) = 5 cm + 5 cm + 5 cm + 5 cm = 20 cm The perimeter of any polygon is the sum of the sides Alternatively if by "equal" you mean the sides sum to 5 cm, then the perimeter is 5 cm. Although this is probably not what you meant =)
5 meters
square has four sides 4 (sides) x 5 (cm) 4 X 5 = 20cm
Square has 4 sides, so 4 x 1.25 = 5 m
perimeter of triangle is sum of three sides i.e if a,b,c are three sides of triangle then perimeter is a+b+c. coming to your question answer is 13+5+x