Answer:
The supplementary angle of an angle is the angle that, when added to it, results in a sum of 180 degrees.
To find the supplementary angle of an angle that measures 119.9 degrees, we can subtract the angle's measure from 180 degrees:
180° - 119.9° = 60.1°
Therefore, the measure of the supplementary angle is 60.1 degrees.
Explanation: