MA19.3.26

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

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.

Vocabulary

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

Aligned Learning Resources

Triangles

Hexagons

Squares

Classify Quadrilaterals StudyJam

Geometry in Dance

Dancing Shape Attributes

Adjacent Angles

Approximating Square Roots of Nonperfect Squares

Design by Adaptive Theme