Transversal Angle Relationships

Alternate exterior angles are pairs of angles that lie outside the two lines and on opposite sides of the transversal.

Consecutive interior angles are pairs of angles that lie between the two lines and on the same side of the transversal.

Alternate interior angles are pairs of angles that lie between the two lines and on opposite sides of the transversal.

Corresponding angles are pairs of angles that are in the same position on two parallel lines in relation to the transversal.

Look for angles that are outside the parallel lines and on opposite sides of the transversal.

Look for angles that are inside the parallel lines and on the same side of the transversal.

Look for angles that are inside the parallel lines and on opposite sides of the transversal.

Look for angles that are in the same relative position at each intersection of the transversal with the parallel lines.

Alternate exterior angles are congruent when the lines are parallel.

Consecutive interior angles are supplementary when the lines are parallel.