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Call of Geometry: Quadrilateral Warfare  
Common Core Math Alignment: 5.G.3. Understand that attributes belonging to a category of twodimensional 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.4. Classify twodimensional figures in a hierarchy based on properties. This work is licensed under a Creative Commons AttributionNonCommercialNoDerivs 3.0 Unported License. 
