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Common Core Teaching Resources


Grade 5 > Standards for Mathematical Practice > Geometry > Classify two-dimensional figures into categories based on their properties > CCSS.MATH.CONTENT.5.G.B.3
Understand that attributes belonging to a category of two-dimensional figures also belong to all subcategories of that category. For example, all rectangles have four right angles and squares are rectangles, so all squares have four right angles.

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