131

\left|\overline{u}\right|^2+\left|\overline{v}\right|^2=\left|\overline{u}+\overline{v}\right|^2
6{,}5^2+7{,}2^2=94{,}09\parallel\sqrt{ }
\left|\overline{u}+\overline{v}\right|=9{,}7cm