Ok, so from what I see, they are related proportionally. One side of a square is related proportionally because in order to find the length, it's 2L(length)+2W(width). So without a side(such as width or length), you couldn't find the parameter. For the area, a side is related proportionally because you need to multiply Length x Width(l x w).
The perimeter and area of a shape are calculated using the lengths of its sides, demonstrating proportionality. The perimeter is calculated as P = 2 L + 2 W and area as A = L × W . Changes in length or width directly affect both perimeter and area proportionally.
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