Education Technology

Geometry: Fixed Perimeter Rectangles

by Texas Instruments


  • Students will investigate side length and area in a rectangle with a fixed perimeter.
  • An algebraic approach is used so that students can generalize their findings to other rectangles.


  • area
  • perimeter

About the Lesson

This activity is designed to be student-centered, with the teacher acting as a facilitator while students work cooperatively. The time varies for the activity depending on whether the TI-Nspire document (.tns file) is provided for or created by the students.