109 degrees and the missing angle are supplementary angles, so they add up to 180 degrees.
180 - 109 = 71
The measurement of ULE can now be found since we now have 2 angles with their degrees. So we add those angles together...
71 + 49 = 120
Now we subtract that from 180 (all of the angles add up to 180 in a triangle) to get the m180 - 120 = 60
The m
