How To Identify Alternate Interior Angles And Alternate Exterior Angles. Look at the blue lines demonstrating the shape - the Z may be back to front as in the second example but the principle is the same. At each intersection the corresponding angles lie at the same place.
Look at the blue lines demonstrating the shape - the Z may be back to front as in the second example but the principle is the same. If the two lines are parallel then the alternate exterior angles are congruent. KLO is not outside the two lines.
KLJ and POQ are alternate exterior angles.
KLJ and NOL are not alternate exterior angles. Finally angle x and angle z are alternate interior angles. KLO is not outside the two lines. Angles 2 and 7 above as well as angles 3 and 6 are examples of alternate interior angles.