Answer :

In ∆ABC given that A=B=45°


So, by the angle sum property in ∆ABC, we have


A + B + C = 180°


45° + 45° + C = 180°


90° + C = 180°


C = 180° - 90°


C = 90°


Hence, largest angle is C


We know that side opposite to largest angle is longest, which is AB


Hence our longest side is AB


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