Which statement is NOT true? Parallel lines x and y are cut by a transversal. The angles formed by line x and the transversal, starting at the top left and going clockwise, are 1, 4, 3, 2. The angles formed by line y and the transversal are 5, 8, 7, 6. CLEAR CHECK The vertical angles theorem can be used to prove 71 . The definition of a linear pair can be used to prove m2+m3=180 . The corresponding angles postulate can be used to prove 15 . The alternate interior angle theorem can be used to prove 28