Answer:
Step-by-step explanation:
So in this problem, there are different associations with angles between two parallel lines (u,v).
The space to the right of the 80-degree angle is supplementary (Sums to 180). Therefore that space is 100 degrees.
The space across from the 80-degree angle, the one with a ?. Is also supplementary, therefore summing to 180 degrees with the 80-degree angle.
(180-80) = 100 degrees for the unknown angle
