Angle 1 = 180-10= 170 degrees, and the relationship is called supplementary angles
D. When you do the math, the results to everything should be t=9. D is the only outlier. Therefore, D is the answer in this case.
1. 130°
I don't remember too many specifics from my past math classes, but I always remembered this because that is an upside-down mirror of the 130° angle.
2. 50°
A straight line is 180°, and 180 - 130 = 50.
