Question

Find the diagonal of a square of side 20cm to 3s.f

Answer 1

`\begin{gathered} The\text{ formula for the diagonal of a square is the following:} \\ d\text{ = }√(2)a \\ Where\text{ a = side of the square} \\ d\text{ = }√(2)\text{ \lparen20\rparen } \\ =\text{ 28.284} \end{gathered}`