Resources and Tools for Elementary Math Specialists and Teachers
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Exploring Properties of Rectangles and Parallelograms Using Dynamic Software

This lesson and interactive applet lets students explore geometric relationships and make and test conjectures. The main task centers on identifying what distinguishes a rectangle from a more general parallelogram. Students manipulate both figures and look for comparisons. Suggestions for implementation and supplemental tasks are provided.
Contributed by: National Council of Teachers of Mathematics, Publisher
Math TopicGeometry, Mathematical Practices, Mathematical Processes
Grade Level3, 4, 5
Resource TypeInteractive Media, Lesson Plans

  • Additional Information
    • AudienceEducator
    • LanguageEnglish (USA)
    • Education Topic
    • Interdisciplinary Connection
    • Professional DevelopmentNo
    • ContributorNational Council of Teachers of Mathematics, Publisher
    • Publication Date2011
    • Rights(c) 2000 - 2011 National Council of Teachers of Mathematics
    • AccessFree access
  • Standards
    • Common Core State Standards for Mathematics

      Select a standards document:

  • User Comments
    • 5
      Great way to discuss properties of quadrilaterals
      By bethb on 01/10/2013 - 15:34
    • I really like how you can manipulate the quadrilaterals. I also like the guiding questions that are provided. I plan to use this with my class on the IWB and discuss which figures we think the rectangle can make, etc.