Education Technology

Dilations in the Plane

Published on 07/19/2006

Activity Overview

A dilation is a transformation that produces a figure with a different size from that of the original figure. In this activity, you will explore the properties of dilations and the relationships between the original and image figures.

Before the Activity

  • See the attached PDF file for detailed instructions for this activity.
  • Print the appropriate pages from the Activity for your class.
  • Install the Cabri®: Jr. App on the students' graphing calculators using TI Connect™, a TI Connectivity Cable and the Unit-to-Unit Link Cable.

During the Activity

  • Distribute the appropriate pages from the Activity to your class
  • Follow the Activity procedures


  • Students will:
  • Investigate properties of a dilation

After the Activity

Review student answers:

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