Assessment timer and count assessment items the area of a square can be found using the equation a = s², where a is the area and s is the measure of one side of the square. match the equation for how to solve for the side length of a square to its description. a square has an area of 60 in2. a.) s= 60 2√ in. b.) s= 60√ in. c.) s= 60² in. d.)s = 60 in.