Use the relationship between supplementary angles ∠a

and ∠b
. What is m∠a if m∠b=121° ?(1 point)
Responses

301°
301 degrees

59°
59 degrees

31°
31 degrees

121°

Supplementary angles add up to 180 degrees. Therefore, if m∠b=121 degrees, m∠a would also be 121 degrees.