Explore the relationships of the angles formed when two parallel lines are cut by a transversal.

• Students will identify pairs of alternate interior angles and same-side interior angles given two lines cut by a transversal.
• Students will recognize which pairs of alternate interior angles are congruent.
• Students will recognize which pairs of same-side interior angles are supplementary.

• parallel lines
• transversal
• alternate interior angles
• same-side interior angles
• supplementary angles
• congruent angles

This lesson involves students recognizing which pairs of alternate interior angles are congruent and which pairs of same-side interior angles are supplementary. As a result students will:

• Click on different segments in order to identify which segments form alternate interior angles and which segments form same-side interior angles.