Reason with shapes and their attributes.
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Analyze characteristics of polygons.
List properties, classify, draw, and identify geometric figures in two dimensions.
Draw points, lines, line segments, rays, angles (right, acute, and obtuse), and perpendicular and parallel lines. Identify these in two-dimensional figures.
Classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines or the presence or absence of angles of a specified size. Recognize right triangles as a category, and identify right triangles.
Use basic properties to classify two-dimensional figures.
Classify two-dimensional figures in a hierarchy based on properties.