Use Attributes to Define 2D Figures

Go beyond simply naming shapes and learn what truly makes them unique in this Grade 1 skill, 'Use Attributes to Define Two-Dimensional Figures.' Students will become shape analysts, focusing on key attributes like the number of straight sides and vertices (corners). They'll learn to confidently state that a triangle is defined by its 3 sides and 3 vertices, and a square by its 4 equal sides and 4 vertices. This builds a deeper, rule-based understanding of geometry and helps distinguish one 2D shape from another.

• Geometry, Shapes and Spatial Sense
• Comparing & Ordering
• Two-dimensional Shapes
• Spatial Sense
• 2D Shapes
• Shape
• Shapes
• Comparing
• Square
• Circle
• Rectangle
• Triangle

• 1.G.A.1 — Distinguish between defining attributes (e.g., triangles are closed and three-sided) versus non-defining attributes (e.g., color, orientation, overall size); build and draw shapes to possess defining attributes.
• AC9M1SP01 — make, compare and classify familiar shapes; recognise familiar shapes and objects in the environment, identifying the similarities and differences between them
• NY-1.G.1
• 1.G.A.1
• MA.1.GR.1.1
• MATH.1.6.B
• ZA.CAPS.MATH.G1.SS.3.3
• ENG-MATH-Y1-GPS.1 — Recognise and name common 2-D and 3-D shapes, including 2-D shapes [for example, rectangles (including squares), circles and triangles].

• Identify Circles, Triangles, Squares, and Rectangles
• Identify 2D Shapes in Real Life (Circles, Triangles, Squares, Rectangles)
• Identify 3-D Shapes in Everyday Objects

• Form Halves and Fourths of Rectangles and Circles