Education Technology

# Can I Make a Triangle?

Math: Geometry: Triangles
9-12
College
45 Minutes
TI-Nspire™
TI-Nspire™ CAS
After this activity, I assigned problems concerning the Triangle Inequality Theorem.
Lessons

# Can I Make a Triangle?

Activity Overview

This TI-Nspire activity is for the Triangle Inequality Theorem. There are 3 problems that contain 3 segments each. The student tries to make triangles with these segments. They compare the lengths of the shortest to the length of the longest to see if the inequality is true or false. For the 4th problem, the student can use segments of any length to make a triangle. Comparisons are made wtih these lengths. It ends with the student writing the Triangle Inequality Theorem.

Before the Activity

Make the TNS file available to students.

During the Activity

Have the students keep the lengths that are given in Problems 1 - 3 .

After the Activity

We discussed the results, and I assigned problems related to the Triangle Inequality Theorem.