Answer:
The answer is 53.4°
Step-by-step explanation:
Let the measure of its supplementary angle be x
Since they are supplementary , it means that the sum of their angles add up to 180°.
To find x add up subtract 126.6 from 180
We have
x = 180 - 126.6
We have the final answer as
53.4°
Hope this helps you
