1. The problem statement, all variables and given/known data The problem is attached as TheProblem.jpg and the answer is A. 2. Relevant equations Geometry rules. 3. The attempt at a solution The triangle which has angles of 30deg and 10deg also has an angle of 180deg-30deg-10deg = 140deg and the other side of the line intersection “scissor” is also 140deg. The two equivalent angles on the other part of the line intersection “scissor” are (360deg-2*140deg)/2 = 40deg. I don't know if what I did so far is even useful nor do I know how to proceed from here. Any help would be greatly appreciated! Thanks in advance!