# Activities

• ##### Download

• • ##### Subject Area

• Math: Middle Grades Math: Problem Solving
• Math: PreAlgebra: Measurement

• ##### Author 6-8

60 Minutes

• ##### Device
• TI-73 Explorer™
• ##### Other Materials
This is Activity 7 from the EXPLORATIONS Book:
Discovering Mathematics with the TI-73: Activities for Grades 5 and 6

The following materials are required for this activity:
• Square color tiles
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How Totally Square Part II

#### Activity Overview

Students understand the concept of perimeter of a square, and discover its formula.

#### Before the Activity

• Set up the calculator as explained in the activity
• See the attached PDF file for detailed instructions for this activity
• Print pages 31 - 34 from the attached PDF file for your class
• #### During the Activity

Distribute the pages to the class.

Follow the Activity procedures:

• Use square colored tiles to create squares
• Record in the Activity sheet the number of people that can be seated around the tables
• Calculate the perimeter of the square
• Observe that the perimeter of a square is the number of people that can be seated around it
• Notice that the perimeter of a square table is 4 times the length of the square
• Write the pattern as a formula y = x * 4, where y represents the number of people, and x denotes the length of the side
• Use the calculator to create a table of side length and perimeter values
• Calculate the different square table arrangements possible to seat a given number of people

#### After the Activity

Students complete the Student Activity sheet.

Review student results:

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