Essential Content for Students K-3
I. Analyze characteristics and properties of two-and three-dimensional geometric shapes and develop mathematical arguments about geometric relationships
A. Two-dimensional geometric shapes:
1. Recognize, name, build, draw, compare, and sort shapes
2. Describe attributes and parts of shapes: circle, rectangle, square, triangle, parallelogram (sides and vertices); locate interior (inside) and exterior (outside) angles
3. Compare shapes made with line segments (polygons) and identify congruent and similar geometric shapes
4. Identify right angles in polygons
5. Investigate and predict the results of putting together and taking apart shapes
B. Three-dimensional geometric shapes
1. Recognize, name, build, draw, compare and sort shapes: sphere (ball), cone, cylinder (can), pyramid, prism (box), cube
2. Describe attributes and parts of shapes; identify faces, edges, vertices (corners)
3. Sort using similar attributes (curved surfaces, flat surfaces)
4. Investigate and predict the results of putting together and taking apart shapes
II. Develop vocabulary and concepts related to two- and three-dimensional geometric shapes
A. Two-dimensional shapes: angle, circle, congruency, line segment, parallelogram, polygon, rectangle, similarity, square, triangle
B. Three-dimensional shapes: cone, cube, cylinder, edge, face, prism, pyramid, sphere, vertices
