Education Technology

Triangle Inequalities

Activity Overview

In this activity, students will discover the Triangle Inequality Theorem and explore the possible lengths of the third side of a triangle given the other two side lengths. Students will also classify the type of triangle as acute, obtuse, or right using the Pythagorean inequalities.

Before the Activity

Download the attached PDF or Word document and look over the information on the first page. Distribute the Student Worksheet and attached calculator files for use during the activity.

During the Activity

Discuss the material from the activity pages with students as needed.

After the Activity

Encourage students to summarize what they have learned from completing the activity.