450 square feet is the size of a rectangle with dimensions of 45 feet long by 10 feet wide. The area’s length times its width gives the square footage of a rectangular space.
The space would need to become narrower if the length were extended in order to maintain its current square footage of 450 feet. In order to fit 450 square feet into a rectangle with a length of just 25 feet, the area must be 18 feet wide. There is no requirement that a 450-square-foot area be rectangular; rather, alternative geometric formulas must be used to determine the square footage of circular, trapezoidal, and triangular areas.