Final answer:
To find the sum of Angle GFE and Angle EFL, we add their measures together. If we don't have the measures, we can use the fact that angles on a straight line add up to 180 degrees.
Step-by-step explanation:
Angle GFE and Angle EFL are angles that belong to the same figure. To find the sum of these angles, we add their measures together. If we know the measures of the angles, we can simply add them. However, if we do not have the measures, we can use the fact that angles on a straight line add up to 180 degrees. So, if we find the measure of one of the angles, we can subtract it from 180 to find the measure of the other angle.