Question 1069318
Check {{{a^2+b^2}}} and {{{c^2}}}
where {{{c }}}is the longest side.
If {{{a^2+b^2=c^2}}}, it's a right triangle.

If {{{a^2+b^2<c^2}}}, it's an obtuse triangle.
If {{{a^2+b^2>c^2}}}, it's an acute triangle.