Education Technology

Angles and Transversals

Activity Overview

Students explore the relationships of angles formed when two parallel or non-parallel lines are cut by a transversal. This activity investigates the terms: Transversal, corresponding angles, alternate interior angles, alternate exterior angles, same-side interior angles, and same-side exterior angles.

Before the Activity

  • Install the Cabri: Jr. App on the students' graphing calculators using TI-Connect™, a TI Connectivity Cable and the Unit-to-Unit Link Cable
  • Use the TI-Navigator™ to transfer the attached Cabri Jr. AppVar files to each calculator
  • See the attached PDF file for detailed instructions for this activity
  • Print pages 15 - 18 from the attached PDF file for your class
  • During the Activity

    Distribute the pages to your class.

    Follow the Activity procedures:

  • Use the AppVar to go directly to the exploration section
  • Draw two non-parallel lines cut by a transversal
  • Drag each line on a point on the line to find conditions when the measures of the corresponding angles are equal
  • Measure each angle and determine the relationship between pairs of angles
  • Draw two parallel lines cut by a transversal
  • Drag the lines and the points on the lines and note the relationship between pairs of angles
  • After the Activity

    Review student results:

  • As a class, discuss questions that appeared to be more challenging
  • Re-teach concepts as necessary