Theorem 6.4 : If a transversal intersects two parallel lines, then each pair of interior angles on the same side of the transversal is supplementary.

If a transversal intersects two parallel lines, then sum of interior angles on the same side of a transversal is _______

Theorem 6.5 : If a transversal intersects two lines such that a pair of interior angles on the same side of the transversal is supplementary, then the two lines are parallel.

Theorem 6.5 : If a transversal intersects two lines such that a pair of interior angles on the same side of the transversal is supplementary, then the two lines are parallel.

Theorem 6.2 : If a transversal intersects two parallel lines, then each pair of alternate interior angles is equal.

Theorem 6.2 : If a transversal intersects two parallel lines, then each pair of alternate interior angles is equal.

If a transversal intersects two parallel lines, then alternate interior angles are on the _______ side of the transversal.

If a transversal intersects two parallel lines, then corresponding angles are on the ______ side of the transversal