Respuesta :

Answer: 73 degrees

Step-by-step explanation:

A line is 180 degrees. 180 - 115 = 65. 180 - 138 = 42

The interior angles of a triangle will also equal 180.

65 + 42 = 107

180 - 107 = 73

Answer:

253

Step-by-step explanation:

I didnt know if i added or multiply