**How To Find Side Length Of A Square – How To Find The Area Of A Square Using The Length Of Its Diagonal**. Let's say you're working with a square with a side length of. Please explain it within a sixth grader's understanding cuz i'n gonna b entering seventh.

Calculate square footage, square meters, square yardage and acres for home or construction project. => from the figure, it can be seen that, side length of the octagon = b => also since the polygons are regular, therefore 2*x + b = a => from the right angled. To find the length of the side of a square when you only know the area, you simply reverse the process, and take the square root of the area.

### If the area enclosed by the square is a, and the length of each side is l, then l = √a.

In other words each grid square is one 'square centimetre'. Thus, the measure of the length of the side of a square plays a very important role. Add all sides together to find the length of each side. Just square the sides, add them, and then take the square root.