Education Technology

Geometry: Scale Factor Area Perimeter

by Texas Instruments


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.