Education Technology

McDougal Littell Geometry: Investigate Proportionality

Published on 10/17/2008

Activity Overview

Students will use the TI-84 Plus family with Cabri Jr. to segment lengths in a triangle.

Before the Activity

  • Review the activity PDF file
  • Make copies of the activity PDF file for your class
  • During the Activity

    Students will:

  • Use Cabri Jr. to draw a triangle.
  • Draw a segment across the triangle parallel to one side.
  • Explore proportionality.


  • Directions:
  • Distribute the student activity sheets
  • Follow the procedures as outlined
  • After the Activity

    As a class, review student progress, discussing questions that appeared to be more challenging, and re-teaching as needed.