4.G.2: Classification and Recognition of Two-Dimensional Figures and Right Triangles
Grade: 4th Grade
Domain: G: Geometry
Standard Description
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.
Domain Description
Understand how to draw and identify various geometric features such as points, lines, segments, rays, and variety of angles in 2D figures. Learn to categorize these 2D figures based on their characteristics like the presence of parallel or perpendicular lines, or specified angle sizes, noting the specific class of right triangles. Also, understand symmetry in 2D figures by recognizing a line across the figure that divides it into identical halves and being able to identify such figures and draw their lines of symmetry.