Education Technology

Scale Factor Area Perimeter

Activity Overview

Explore the relationship of perimeter and area in similar triangles when the scale factor is changed.


Change the scale factor of similar triangles to make relative comparisons of the areas and perimeters



  • scale factor
  • dilate
  • area
  • perimeter

About the Lesson

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