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.