In the figure below, lines m and n are parallel: (picture below)In the diagram shown, ∠7 measures 92 degrees. What is the measure of ∠8? 8 degrees 88 degrees 92 degrees 180 degrees

HI there!
The sum of angles 7 and 8 is 180, so to find angle 8 you would subtract angle 7 from 180. So:
180 - 92 = 88 
The answer is B, 88 degrees. 
Hope this helps!!