Understand that attributes belonging to a category of two-dimensional figures also belong to all subcategories of that category

Start lessonBegins with Property inheritance in shape categories · Slides

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5.G.B.3

**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.

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.

What you'll learn

Explain that when a category of two-dimensional figures has a specific attribute, every subcategory of that category also has that attribute
Identify the category-subcategory relationships among quadrilaterals (quadrilaterals, parallelograms, rectangles, rhombuses, squares)
Use deductive reasoning to determine whether a given property applies to a subcategory by tracing it from the parent category
Justify why "all squares are rectangles" is true while "all rectangles are squares" is false, using attribute inheritance
Construct or interpret a diagram (Venn diagram or tree diagram) that shows how categories of two-dimensional figures nest inside one another

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Property inheritance in shape categories

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