Respuesta :

Answer:

42

Step-by-step explanation:

im pretty sure I got this right I did it in my head

Answer:

m 5 = 42

Step-by-step explanation:

A line is 180 degrees. m 4 = 138 degrees. 180 - 138 = 42 degrees. this makes m 1 = 42 degrees and m 5 is equal to m 1.