Angles Formed by Parallel Lines and Transversal

Step 1: Use a straightedge to darken any two horizontal lines on a piece of lined paper.

Step 2: Draw a transversal for the lines and label the angles 1 through 8. Use a protractor to find the measure of each angle.

Alternate Interior angles: If two lines are cut by a transversal, then each pair of alternate angles is congruent.

Consecutive Interior angles: If two lines are cut by a transversal, then each pair of consecutive interior angles is supplementary.

Read the explanation below to learn more about angles formed by parallel lines and transversal.

Practice: Answer the following exercises about angles formed by parallel lines and transversal.