# How do you express in radical form the length of the diagonal of a square whose sides are each 2 meters long?

Oct 12, 2015

I found $2 \sqrt{2} m$
You can use Pythagora's Theorem where the diagonal $d$ is given in terms of the length of the two sides $s$ as:
${d}^{2} = {s}^{2} + {s}^{2} = 2 {s}^{2}$
$d = \sqrt{2 {s}^{2}}$
$d = \sqrt{8} = 2 \sqrt{2}$