Since the theorem is: [tex] c^{2} = a^{2} + b^{2} [/tex] And by inspection, [tex] 5^{2} [/tex] would be the hypotenuse, [tex] 5^{2} = 3^{2} + 4^{2} [/tex] 25 = 9 + 16 RHS = 9 + 16 = 25 = LHS Therefore, we have proved that the values fit into pythagoras' theorem, which means that the triangle is a right triangle (that is the central idea of this theorem).
