Education Technology

Connecting Translations, Reflection, and Rotations

Published on 06/09/2008

Activity Overview

In this activity, students will investigate the relationship among the three types of rigid transformations - translations, rotations, and reflections.

Before the Activity

  • Install the Cabri Jr. App on the students' graphing calculators using TI-Connect™, a TI Connectivity Cable and the Unit-to-Unit Link Cable
  • Use the TI-Navigator™ to transfer the attached Cabri Jr. AppVar files to each calculator
  • See the attached PDF file for detailed instructions for this activity
  • Print pages 59 - 60 from the attached PDF file for your class
  • During the Activity

    Distribute the pages to your class.

    Follow the Activity procedures:

  • Use the AppVar to go directly to the exploration section
  • Construct a triangle and reflect it across two parallel lines
  • Use transformation tools to explore ways to make a triangle that is equivalent to the composition of reflections across parallel lines
  • Construct a triangle and reflect it across two intersecting lines
  • Use transformation tools to explore ways to make a triangle that is equivalent to the composition of reflections across intersecting lines
  • After the Activity

    Review student results:

  • As a class, discuss questions that appeared to be more challenging
  • Re-teach concepts as necessary