Answer:
∠DGF
Step-by-step explanation:
Supplementary angles are those that add up to 180 degrees. Or, if no specific degrees are given (like in this case), supplementary angles are simply those that constitute a perfect line.
Looking at the diagram, the lines are CF, AD, and BE. Our angle is ∠CGD. Notice that both angles ∠DGF and ∠CGB are possible supplementary angles to ∠CGD because ∠CGD + ∠DGF make a line and ∠CGD + ∠CGB make a line.
We can just choose any of the two: say, ∠DGF.
~ an aesthetics lover
