Answer: 67.4 degrees
Explanation:
Since 121.8 is an exterior angle you can do 121.8 - 17.3 which would give you 104.5 for angle 2.
Angle 2 is also an exterior angle to the other triangle, so you can do 104.5 - 37.1 which would give you 67.4.
Angle 1 is 67.4 degrees.