26 - a, assuming you know a. If you don't the question is meaningless.
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A square with a side length of 13cm (52/4) has an area of 169cm2
A square has equal length sides, so each side is 13 in. The perimeter is the distance of the 4 sides added together. The perimeter is: 13 + 13 + 13 + 13; which is 52 in.
Perimeter = 4*13 = 52 units of measurment
perimeter_of_square = 4 x side ⇒ side = perimeter ÷ 4 = 52 cm ÷ 4 = 13 cm area_of_square = side2 = (13 cm)2 = 169 cm2
P=2(w)+2(l) 52=2(12)+2(l) 52=24+2l 52-24=2l 28=2l 14=l The length is 14 cm.