c) Bill explained to his apprentice that a new gate, 3m x 4m with a 5m diagonal, definitely had a right angle as the measurements complied with Pythagoras's Theorem. By using Pythagoras's Theorem, show the working that Bill could have written down for his apprentice to demonstrate that an old 4m x 5m gate with a 6m diagonal could not possibly have a right angle. Sm 6m . 3m 4m 4mn 5m