Respuesta :

Answer:

60 degrees

Step-by-step explanation:

Each triangle needs to add up to 180 total degrees.  70+50=120,

180

-

120

___

60
Answer; 120

Why? because all triangles equal 180, so 70+50= 120 and 180-120= 60, all straight lines are 180 and 180-60= 120