During this unit, students will be describing, analyzing, and comparing quadrilaterals. They will classify the quadrilaterals by their sides and angles, and connect these attributes with definitions of them.  Students will also recognize area and perimeter as an attribute of two dimensional regions and apply prior work with these concepts to solve problems.

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Key Vocabulary

Students need to:

  • Understand that shapes in different categories (e.g., rhombuses, rectangles, and others) may share attributes (e.g., having four sides), and that the shared attributes can define a larger category (e.g., quadrilaterals). Recognize rhombuses, rectangles, and squares as examples of quadrilaterals, and draw examples of quadrilaterals that do not belong to any of these subcategories.
  • Solve real world and mathematical problems involving perimeters of polygons, including finding the perimeter given the side lengths, finding an unknown side length, and exhibiting rectangles with the same perimeter and different areas or with the same area and different perimeters.