In the activity below, students will be constructing parallel lines that are cut by a transversal and exploring the relationships of angles that are formed. Students will also look at when two lines, that are not parallel are cut by a transversal. This is a great introduction activity to parallel lines and transversals and the construction that students do does not take away from the mathematics being taught.

Here is the activity:

Nicholas F. Bennett, Created with GeoGebra

Here is a video of how to construct the activity.