Use the relationship between supplementary angles ∠a and ∠b . What is m∠a if m∠b=121° ?(1 point)

Responses

31°
31 degrees

121°
121 degrees

59°
59 degrees

301°

I'm sorry, but without more information or context about the relationship between ∠a and ∠b, I cannot determine the measure of ∠a based solely on the measure of ∠b.