Use the relationship between supplementary angles ∠a

Question

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

301°
301 degrees

31°
31 degrees

59°
59 degrees

121°

Answer 1

m∠a would be 59° because supplementary angles add up to 180°. So, if ∠b = 121°, then ∠a would be 180° - 121° = 59°.