Education Technology

Triangle Midsegments

Activity Overview

Investigate the relationships between a triangle and the similar triangle formed by one of the triangle's midsegments.


  • Capture the lengths of a triangle midsegment and the side of the triangle not connected to it
  • Analyze the relationship between the lengths using a formula in the spreadsheet
  • Measure areas and define them as variables
  • Investigate relationships for the measurement data with a spreadsheet


  • similarity
  • similar triangles
  • midsegment

About the Lesson

  • This “create your own” activity is designed for students to work independently or with a partner to complete this lesson. The time varies for this activity depending on whether the TI-Nspire document (.tns file) is provided or created by the students.