use the relationship between supplementary angles ∠a and ∠b . What is m∠a if m∠b=121° ?(1 point) Responses 59° 59 degrees 121° 121 degrees 31° 31 degrees 301°

Answer 1

The relationship between supplementary angles is that they add up to 180°.

Since ∠a and ∠b are supplementary angles, if m∠b = 121°, then m∠a = 180° - m∠b.

Therefore, m∠a = 180° - 121° = 59°.

The correct response is 59°.