Education Technology

Exterior Angle Theorem

Published on 07/19/2006

Activity Overview

This activity uses the graphing calculator to show the relationship between an exterior angle of a triangle and the two remote interior angles.

Before the Activity

See the attached Activity PDF file(s) for detailed instructions for this activity.
Install The Geometer's Sketchpad® App on the students' graphing calculators following the attached instructions.

During the Activity

Follow the procedures outlined in the activity.
Students will:

  • Learn the relationship between the exterior angle of a triangle and the two remote interior angles.
  • After the Activity

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