An interior angle is an angle defined by two sides of a polygon and that is inside the polygon.
Opposite interior angles are specific pairs of interior angles, those that are opposite each other in the polygon.
Alternate or opposite interior angles are also angles that lie on opposte sides of the tranversal line that cuts through parallel lines.
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Yes. Alternate interior and alternate exterior angles are congruent.
Alternate interior angles are equal on a transversal that passes through parallel lines.
Angles on opposite sides of the transversal and between the parallel lines
Alternate interior angles.
Parallel lines cut by a transversal form congruent alternate interior angles.