Respuesta :

Answer:

m5 = 57° and m7 = 57°

Step-by-step explanation:

We know that:

m4 = m8

m5=m7

Which means that:

m8=123°
m5+m8=180° since it is a line

Computations:

m5+123°=180°
m5=57°


since m5 = m7, m7 also equals 57°