732. Given the sides of a triangle expressed in numbers. How can one determine with a rather simple calculation whether this triangle is right-angled, acute-angled, or obtuse-angled? Provide numerical examples.
732. Let a be the largest of the sides, $b$ and $c$ the other sides. If $a^{2}>b^{2}+c^{2}$, then angle $\alpha$ is obtuse; if $a^{2}=b^{2}+c^{2}$, then angle $\alpha$ is right; if $a^{2}<b^{2}+c^{2}$, then angle $\alpha$ is acute.