U.S. National Standards
N.3. Geometry (NCTM)
3.1. Analyze characteristics and properties of two- and three-dimensional geometric shapes and develop mathematical arguments about geometric relationships.
3.1.1. Precisely describe, classify, and understand relationships among types of two- and three-dimensional objects using their defining properties.
3.2. Specify locations and describe spatial relationships using coordinate geometry and other representational systems.
3.2.1. Use coordinate geometry to represent and examine the properties of geometric shapes.
3.2.2. Use coordinate geometry to examine special geometric shapes, such as regular polygons or those with pairs of parallel or perpendicular sides.