Mark the diagonal on the other line from the same starting point Mark the length down the line from the diagonal mark Check the width the length and diagonal measurements to ensure everything is right. To calculate the diagonal of a square multiply the length of the side by the square root of 2. Plug the area measurement into the formula.
Perimeter of a square when diagonal is given calculator uses Perimeter4 Diagonalsqrt 2 to calculate the Perimeter The perimeter of a square is the total length of all the sides of the square.
In the above figure the square of the side a unit has been divided into two right triangles with the help of diagonal of length d units. For finding the diagonal of a square using this method we simply need to follow some simple rule. Diagonal of a Square 2x where x length of any side of the square. Lets say each one has a length of s.