Identify, name, describe, and sort circles, triangles, squares, rectangles, hexagons, and other familiar two-dimensional shapes by their straight or curved sides, vertices, and defining attributes, regardless of size or orientation, and recognize open and closed figures and simple symmetry. Identify and compare cubes, rectangular prisms, cylinders, cones, and spheres by their flat or curved surfaces, faces, edges, and vertices, including how objects stack or roll. Compose and decompose two- and three-dimensional shapes, including partitioning rectangles into equal squares, recognizing that different arrangements can form the same whole.