Lesson Plan

Classifying Quadrilaterals


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Big Ideas




In this lesson, students will study the different types of quadrilaterals, focusing on their commonalities and distinctions. Students will:

  • identify and describe the attributes of quadrilaterals.
  • classify quadrilaterals based on characteristics into subcategories of quadrilaterals, including parallelograms, rectangles, rhombi, squares, and trapezoids.

Essential Questions

  • How can patterns be used to describe relationships in mathematical situations?
  • How can recognizing repetition or regularity assist in solving problems more efficiently?
  • How can the application of the attributes of geometric shapes support mathematical reasoning and problem solving?
  • How can geometric properties and theorems be used to describe, model, and analyze situations?
  • How are spatial relationships, including shape and dimension, used to draw, construct, model, and represent real situations or solve problems?


  • Pentagon: A polygon with exactly five sides.
  • Polygon: A closed plane figure bounded by three or more line segments that only meet at their endpoints.
  • Quadrilateral: A polygon with exactly four sides.
  • Rhombus: A quadrilateral with sides of equal length.


60–90 minutes

Prerequisite Skills


  • geoboards and rubber bands

(a virtual geoboard can be found at http://www.mathplayground.com/geoboard.html)

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