Square

Side of the square is denoted by the letter \(a\). Diagonal is denoted by the letter \(d\) .

The formula for the perimeter of a square: \[Ob=4a \]

The formula for the area of a Square: \[P=a^2\ \\[6pt] P=\frac{1}{2}d^2 \]

The formula for the length of the diagonal of of the square: \[d=a\sqrt{2}\]