Use the relationship between supplementary angles ∠a
and ∠b
. What is m∠a if m∠b=121°?(1 point)
Responses
121°
121 degrees
31°
31 degrees
59°
59 degrees
301°
The relationship between supplementary angles is that they add up to 180 degrees. So if m∠b = 121°, we can find m∠a by subtracting 121° from 180°.
Therefore, m∠a = 180° - 121° = 59°.
So the answer is 59°.