Question

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

Answer 1

If two angles are supplementary, their measures add up to 180 degrees. Therefore, if m∠b = 121°, then m∠a would be 180° - m∠b = 180° - 121° = 59°. So, m∠a is 59°.