We have the following:
As the angles are equal, that is, both 45 °, the legs will be equal, therefore, by means of the Pythagroma theorem we can calculate the measure of the legs just like this
[tex]\begin{gathered} h^2=a^2+b^2 \\ a=b \\ h^2=a^2+b^2 \\ h^2=2a^2 \\ 2a^2=10^2 \\ a^2=\frac{100}{2} \\ a=\sqrt[]{50} \\ a=5\sqrt[]{2} \\ b=5\sqrt[]{2} \end{gathered}[/tex]
