Resources and Tools for Elementary Math Specialists and Teachers
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Shape Builder

This interactive Java applet allows users to explore the relationship between area and perimeter of both rectangles and irregular shapes. In the "Auto Draw" mode a shape is given, and the user finds the area and the perimeter. In the "Create Shape" mode users create their own shape and give the area and perimeter of that shape. The activity allows users to explore the relationship between shapes with a fixed perimeter and variable area or shapes with a a fixed area and variable perimeter. An optional scoring feature allows users to keep track of the number correct.
Contributed by: Shodor, Publisher
Math TopicMeasurement, Mathematical Practices, Mathematical Processes
Grade Level3, 4, 5
Resource TypeInteractive Media

  • Additional Information
    • AudienceEducator, Learner
    • LanguageEnglish (USA)
    • Education Topic
    • Interdisciplinary Connection
    • Professional DevelopmentNo
    • ContributorShodor, Publisher
    • Publication Date2005
    • RightsCreative Commons Attribution-NonCommercial 3.0 Unported License
    • AccessFree access
  • Standards
    • Common Core State Standards for Mathematics

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