Question

can anyone help answer this

Answer 1

You have 2 pieces of information.

a) it's a triangle so the internal angles add up to 180
b) it's isosceles, so the 2 remaining angles are equal

Answer 2

like @bibby said
(180 - 38 )/ 2 = angle
since both of the angles are equal divide it by 2

Answer 3

71 O.o

Answer 4

if you want an algebraic representation: