Education Technology

Midsegments of Quadrilaterals

Activity Overview

In this activity, students will extend their understanding of midsegments by investigating the midsegments of a quadrilateral and the midsegment quadrilateral.

Before the Activity

  • Install the Cabri Jr. App on the students' graphing calculators using TI-Connect™, a TI Connectivity Cable and the Unit-to-Unit Link Cable
  • Use the TI-Navigator™ to transfer the attached Cabri Jr. AppVar files to each calculator
  • See the attached PDF file for detailed instructions for this activity
  • Print pages 149 - 150 from the attached PDF file for your class
  • During the Activity

    Distribute the pages to your class.

    Follow the Activity procedures:

  • Use the AppVar to go directly to the exploration section
  • Construct the midsegment quadrilateral of a general quadrilateral
  • Investigate the properties of a quadrilateral
  • Drag the vertices and /or sides of a quardrilateral and observe whether these properties are true for a quadrilateral
  • Use various measurement tools to investigate the relationship between a quardrilateral and its midsegment quardrilateral
  • After the Activity

    Review student results:

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