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Angle relationships with parallel lines

Problem

Below are two parallel lines with a third line intersecting them.
Two parallel lines with a third line intersecting each line. Where the third line crosses the left most parallel line, the top, left angle measure is x degrees. Where the third line crosses the right most parallel line, the bottom, right most angle measure is 81 degrees.
x=
  • Your answer should be
  • an integer, like 6
  • an exact decimal, like 0.75
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
Stuck?
Stuck?