Question

In ABC ,AC=BC
angle a=50 , which is the longer side

Answer 1

$ac = bc \\ \\ so \: angle \: b = angle \: a \\ \\ b = a = 50 \\ but \: here \\ \\ a + b + c = 180 \\ \\ 50 + 50 + c = 180 \\ \\ 100 + c = 180 \\ \\ c = 180 - 100 = 80 \\ \\ c = 80 \\ \\ so \: \: ab \: side \: is \: long \\ \\ your \: answer \: is \: ab$