Use the relationship between supplementary angles ∠a and ∠b . What is m∠a if m∠b=121° ?(1 point) Responses 59° 59 degrees 31° 31 degrees 301° 301 degrees 121°
Since supplementary angles add up to 180 degrees, if m∠b = 121°, then m∠a would be:
180° - 121° = 59°
Therefore, m∠a would be 59 degrees.