To proof if a triangle is a right angled triangle, Pythagoras theorems must be obeyed
Pythagoras theorem states that
[tex]\begin{gathered} c^2=a^2+b^2\text{ where c = hypotenus, i.e the longest sides} \\ a,\text{ and b are the other two sides} \\ \end{gathered}[/tex]
nows, lets test the triangle with pythagoras theorem
longest side, c = 97, a = 65, b = 72
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