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Grade 3

CCSS Math Standard: 3.G.1

Reason with shapes and their attributes. 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.

What’s In My Brain: Pentagon vs Pentagon

What’s In My Brain: Pentagon vs Pentagon

We’re looking at regular vs irregular polygons.

Geometry Image: University Ave

Geometry Image: University Ave

What odd and interesting shapes can your students find in this geometric image?

Geometry Image: Victoria Conference Center

Geometry Image: Victoria Conference Center

What odd and interesting shapes can your students find in this geometric image?

What’s In My Brain: Trapezoids or Not?

What’s In My Brain: Trapezoids or Not?

Which are trapezoids and which are not?

Grouping Quadrilaterals In A Hierarchy

Grouping Quadrilaterals In A Hierarchy

Can we classify quadrilaterals like we classify living things?