Mathematics (2019) Grade(s): 5

MA19.5.23

Explain that attributes belonging to a category of two-dimensional figures also belong to all subcategories of that category.

COS Examples

Example: All rectangles have four right angles, and squares have four right angles, so squares are rectangles.

Unpacked Content

Knowledge

Students know:
  • vocabulary associated with the properties of shapes.

Skills

Students are able to:
  • Explain the relationship between shapes in categories and subcategories.

Understanding

Students understand that:
  • Quadrilaterals can be identified by general properties to more specific properties.
  • Properties belonging to a category of two-dimensional figures also belong to all subcategories of that category.

Vocabulary

  • Attribute
  • Category
  • Subset
  • Subcategory
  • Two-dimensional
  • Figure
  • Quadrilateral
  • Right angle
  • Parallel
  • Perpendicular
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