Use the relationship between supplementary angles a and b. What is m a if m b = 121°? (1 point)
301°
59°
121°
31°
Since supplementary angles add up to 180 degrees, and we know that angle b is 121 degrees, we can find angle a by subtracting 121 degrees from 180 degrees.
180° - 121° = 59°
Therefore, m a is 59 degrees.