Let us remove the transversal t1 because it does not factor in our problem.
angle 4 is equal to 65 degrees. It is an interior angle. It is also congruent to angle 2.
Angle 2 is equal to 65 degrees. Both angle 2 and angle 1 are supplementary angles. This means that their sum is equal to 180 degrees.
Angle 1 = 180 degrees - 65 degrees.
Angle 1 = 115 degrees.
