If a transversal intersects two parallel lines; then each pair of consecutive interior angles are supplementary.

If a transversal intersects two parallel lines; then each of alternate interior angles are equAL.

If a transversal intersects two lines in such a way that a pair of consecuitive interior angles are supplementary; then 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.

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.

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 prove that each pair of alternate interior angles is equal.

If a transversal intersects two parallel lines, then alternate interior angles have one common _______

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