Use the relationship between supplementary angles ∠a
and ∠b
. What is m∠a if m∠b=121° ?(1 point)
Responses
121°
121 degrees
301°
301 degrees
31°
31 degrees
59°
Since ∠a and ∠b are supplementary angles, the sum of their measures is equal to 180 degrees.
So, m∠a = 180° - m∠b = 180° - 121° = 59°