Education Technology

Perimeter and Area of a Square

Activity Overview

Students study the perimeter and area of a square, and explore the relationship between them and the length of the side of the square.

Before the Activity

Install the Cabri™: Jr. App on the students' graphing calculators using one of these two methods:

  • TI-Connect™,  a TI Connectivity Cable, and the Unit-to-Unit Link Cable
  • TI-Navigator™  "send to class" feature
  • See the attached PDF file for detailed instructions for this activity
  • Print pages 69 - 70 from the attached PDF file for your class
  • During the Activity

    Distribute the pages to the class.

    Follow the Activity procedures:

  • Use the Regular Polygon feature on the calculator to construct a square
  • Measure and record the length of one side of the square
  • Measure the perimeter and area of the square
  • Alter the square until its side length is 1 cm and record the values of perimeter and area in a table
  • Record the side length, perimeter, and area of squares with side lengths of 2, 3, 4, 5, and 6cm
  • Observe that the perimeter of a square increases by 4 units as the length of the side increases by 1 unit
  • Compare the first six perfect square numbers to the numbers in the Area column
  • Observe that the area of a square is always a perfect square number
  • After the Activity

    Review student results:

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