Bird's-eye View Aerial City Landscape Photography

(1) O = s2, where O is the output (area protected) and s stands for the length of a side. This equation shows that output is proportional to the square of the length of a side.
The inputs depend on the length of the perimeter:
(2) I = 4s, where I stands for the quantity of inputs. This equation shows that the perimeter is proportional to the length of a side.