Yes, because the top and bottom go the same way. The diagonal line means nothing in parallelism.
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When two parallel lines are intersected by a transverse line, they form eight angles. You can consider the parallel lines as the horizontal lines of the letter Z and the transversal as the sloped line of Z. Then the two angles in that Z-shape are the Z angles. The transversal for Z-angles can slope either way. It can be proved that Z-angles, properly called ALTERNATE angles, are equal.
They are always identical angles unless the bottom and top lines are not parallel!!!!
Z
A letter of the alphabet
Z