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Homework Statement
The problem is attached as TheProblem.jpg and the answer is A.
Homework Equations
Geometry rules.
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!