Respuesta :

Since two sides are congruent, the opposite angles are congruent.
Angles A and B have the same measure.

m<A = m<B = 34

m<A + m<B  m<C = 180

34 + 34 + m<C = 180

68 + m<C = 180

m<C = 112

m<C = 4y = 112

4y = 112

y = 28