The length of each side of the square is 5ft
Area of the composite figure = area of square + area of a triangle
Substitute the given information
32.5 = Area of square + 7.5
Area of square = 32.5 - 7.5
Area of squar = 25.0 ft^2
Since Area of square = L^2
L = 5ft
Hence the length of each side of the square is 5ft
Learn more on area of composite shapes here: https://brainly.com/question/8408690