Answer:
123°
Step-by-step explanation:
A supplementary is an angle where two angles add up to be 180°.We can subtract to find its supplement.
180 - 57 = 123°
Best of Luck!
The supplementary angle is the other angle that makes both angles a linear pair.
So you would do 180° - 57° to solve your answer, which equals 123°
Hope this helps!
