Learning Resource Type

Classroom Resource

Classifying Quadrilaterals

Subject Area

Mathematics

Grade(s)

3, 5

Overview

In this video, examine strategies to identify the properties of quadrilaterals—specifically, parallelograms. Students will compare and contrast squares, rectangles, and rhombuses, which are all parallelograms. In the accompanying classroom activity, students create posters identifying the properties of various quadrilaterals. They explore how these shapes compare and contrast and then analyze the ways that parallelograms distinguish themselves from other quadrilaterals.

    Mathematics (2019) Grade(s): 3

    MA19.3.26

    Recognize and describe polygons (up to 8 sides), triangles, and quadrilaterals (rhombuses, rectangles, and squares) based on the number of sides and the presence or absence of square corners.

    Unpacked Content

    UP:MA19.3.26

    Vocabulary

    • Attribute
    • Category
    • Sub-category
    • Opposite sides
    • Angles
    • Quadrilateral
    • Triangle
    • Pentagon
    • Hexagon
    • Septagon
    • Heptagon
    • Octagon
    • Polygon
    • Square
    • Trapezoid
    • Rhombus
    • Rectangle
    • Two-dimensional

    Knowledge

    Students know:
    • that shapesin different categories may share attributes and that the shared attributes can define a larger category.

    Skills

    Students are able to:
    • Identify two-dimensional shapes.
    • Sort shapes according to number of sides.
    • Sort quadrilaterals based on the presence or absence of square corners.
    • Draw examples of squares, rectangles, and rhombuses.
    • Draw quadrilaterals that are not rhombuses, rectangles, and squares.

    Understanding

    Students understand that:
    • Attributes of a shape help make decisions about how to categorize the shape.
    • Certain attributes are needed to belong to the subcategories of rhombuses, rectangles, and squares.
    • Sometimes a shape does not have the attributes needed to belong to the subcategories of rhombuses, rectangles, and squares.
    Mathematics (2019) Grade(s): 5

    MA19.5.21

    Classify triangles according to side length (isosceles, equilateral, scalene) and angle measure (acute, obtuse, right, equiangular).

    Unpacked Content

    UP:MA19.5.21

    Vocabulary

    • Classify
    • Polygon
    • Side measure
    • Angle measure
    • Isosceles
    • Equilateral
    • Scalene
    • Acute
    • Obtuse
    • Right
    • Equiangular

    Knowledge

    Students know:
    • Measurable attributes of triangles include length of side and angle measures.
    • Appropriate tools and units of measure for length of side and angle measures.

    Skills

    Students are able to:
    • Classify triangles according to side measures and angle measures.

    Understanding

    Students understand that:
    • triangles can be described and classified by their properties of side length, angle size, or cross-classify to include both side length and angle size.
    Mathematics (2019) Grade(s): 5

    MA19.5.22

    Classify quadrilaterals in a hierarchy based on properties.

    Unpacked Content

    UP:MA19.5.22

    Vocabulary

    • Quadrilateral
    • Hierarchy
    • Two-dimensional
    • Properties
    • Attributes
    • Polygon
    • Rectangle
    • Rhombus
    • Square
    • Trapezoid
    • Parallelogram

    Knowledge

    Students know:
    • properties or attributes of two-dimensional shapes.

    Skills

    Students are able to:
    • Classify quadrilaterals based on properties.

    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.
    Link to Resource

    CR Resource Type

    Audio/Video

    Resource Provider

    PBS
    Accessibility
    License

    License Type

    CUSTOM
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