Answer: remember that the triangle always equals 180
1. 29+78= 107 and 107 is the exterior angle but 73 is the last angle.
2. 95+85=180 and 180 is the exterior angle but 0 is the last angle.
3. 37+53=90 and 90 is the exterior angle but 90 is the last angle.
4. 29+56=85 and 85 is the exterior angle but 95 is the last angle.
