Learning Resource Type

Classroom Resource

Triangles

Subject Area

Mathematics

Grade(s)

3

Overview

The CyberSquad must build a path to cross a stream of hot lava. They find a pile of triangle-shaped tiles which float in the lava and don’t melt. They work together to try to figure out how to create a path made of the triangle tiles that has no gaps and no overlaps.

    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.
    Link to Resource

    Resource Provider

    PBS
    Accessibility
    License

    License Type

    CUSTOM
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