# A square has a side length 10 yards what is the length of a diagonal of the square?

The length of diagonal of square is $14.14 \left(2 \mathrm{dp}\right)$ yards.
The length of diagonal of a square of side $x$ is $l = \sqrt{2} \cdot x$
So the length of diagonal of a square of side $10$ is $l = \sqrt{2} \cdot 10 = 14.14 \left(2 \mathrm{dp}\right)$yards [Ans]