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This lesson unit is intended to help you assess how well students can: Understand the concepts of length and area. Use the concept of area in proving why two areas are or are not equal. Construct their own examples and counterexamples to help justify or refute conjectures.


  • Mathematics > General
  • Mathematics > Geometry

Education Levels:

  • Grade 9
  • Grade 10
  • Grade 11
  • Grade 12


area; length; proof geometry



Access Privileges:

Public - Available to anyone

License Deed:

Creative Commons Attribution Non-Commercial


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Curriki Rating
On a scale of 0 to 3
On a scale of 0 to 3

This resource was reviewed using the Curriki Review rubric and received an overall Curriki Review System rating of 3, as of 2014-04-27.

Component Ratings:

Technical Completeness: 3
Content Accuracy: 3
Appropriate Pedagogy: 0

Reviewer Comments:

This activity investigates the medians of a triangle using Geometer's Sketch Pad. Geometer's Sketch Pad is a free application that should be downloaded prior to assigning the lesson. The activity could still be done without sketch pad, provided students have experience in geometry constructions. The activity is well written and includes an answer sheet.

Not Rated Yet.

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