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

Question

Responses

301°
301 degrees

121°
121 degrees

59°
59 degrees

31°

Answer 1

Supplementary angles are two angles that add up to 180 degrees. Therefore, if angle b is 121 degrees, then the measure of angle a would be 180 degrees minus 121 degrees, which is 59 degrees. Therefore, m∠a = 59°.