Activity Detail

If you are using a TI-73, TI-83, TI-84 or TI-89, there may be particular math or science applications you will need to download to use certain activities. If you are using TI-Nspire technology, please update your TI-Nspire handheld operating system or computer software to view the latest activities. The latest TI-Nspire operating system was released in June 2009.
Browse by Subject Submit Activity Saved Activities Advanced Search
  


add to saved activities



print this activity
 
Ratios in Regular Polygons
 


Activity Overview

Students use linear measurement and calculators to investigate the ratios between corresponding parts of regular polygons.

Before the Activity

  • See the attached PDF file for detailed instructions for this activity
  • Print student activity sheets pages 97 - 98 from the attached PDF file for your class


  • During the Activity

    Distribute the pages to the class.

    Follow the activity procedures:
  • Draw several triangles, compare them, and look for any similarities among all the triangles
  • Draw several different sized equilateral triangles, compare the triangles, and look for similarities
  • Do the same experiment with rectangles, and then squares
  • Note, the rectangles come in all shapes; the squares are all the same shape but different sizes
  • Give students the picture of several different-sized squares, and have them measure the length of the diagonal and the perimeter of each square, record their findings on the recording sheet, and look for patterns
  • Record the same data for other regular polygons of several different sizes and look for patterns


    After the Activity

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


    Other Downloads




    view standards alignment
    view textbook alignment

    Subject Area:
    Math : Elementary Math : Geometry
    Math : PreAlgebra : Geometry
    Math : Middle Grades Math : Geometry

    Author:
    Texas Instruments

    Level:
    5-8, K-4

    Activity Time:
    60 Minutes

    Device:
    TI-10, TI-15 Explorer™

    Apps:
     

    Software:
     

    Accessories:
     

    Other:
    This is Activity 20 from the EXPLORATIONS Book:
    Uncovering Math with Manipulatives, the TI-10, and the TI-15 Explorer

    The following materials are required for this activity:

  • Ruler
  • Pencils
  • Protractors


  • Report an issue with this activity