First Grade Geometry: 2D & 3D - Shapes, Symmetry, and Composing ActivitiesCommon Core Math Geometry Updated 2025 CurriculumThis guide focuses on geometry for first graders, helping students learn: Shape Identification: Recognize and name 2D shapes (circle, square, rectangle, triangle) and 3D shapes (cube, cone, cylinder, sphere).Flat vs. Solid Shapes: Differentiate between 2D and 3D shapes based on their properties.Composing and Decomposing Shapes: Combine or break down shapes to form new ones,