Use Attributes to Define 2D Figures

Define 2D shapes by counting their sides and corners!

1st Grade - Math - 2D shapes

About This Skill

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.

Skills & Topics

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

Curriculum Alignment

  • 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].

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