OREGON MATH STANDARDS (2021): [3.GM]

2021 Oregon Math Guidance: 3.GM.A.1

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Cluster: 3.GM.A - Reason with shapes and their attributes.

STANDARD: 3.GM.A.1

 Standards Statement (2021):

Understand that shapes in different categories may share attributes and that shared attributes can define a larger category.

  Connections:

Preceding Pathway Content (2021)

Subsequent Pathway Content (2021)

Cross Domain Connections (2021)

Common Core (CCSS)

(2010)

2.GM.A.1

4.GM.A.1, 5.GM.B.3, 5.GM.D.6

 N/A

3.G.A.1

3.GM.A Crosswalk

 Standards Guidance:

Clarifications

  • 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.
  • There should be a focus on the investigation of quadrilaterals, specifically, but other polygons should also be explored.

Progressions

  • Students should be able to analyze, compare, and classify two dimensional shapes by their properties. Because they have built a firm foundation of several shape categories, these categories can be the raw material for thinking about the relationships between the classes. (Please reference page 13 in the Progression document).

Examples

  • Compare and classify shapes by their sides and angles.
  • Recognize rhombi, rectangles, squares, and trapezoids as examples of quadrilaterals, and draw examples of quadrilaterals that do not belong to any of these subcategories.