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Students develop verbal, visual and mental representations of lines, angles and two-dimensional shapes, their parts and properties, and different orientations.

Early Stage One

SGES1.2: Manipulates, sorts and describes representations of two-dimensional shapes using everyday language.

Key ideas:

Stage One

SGS1.2: Manipulates, sorts, represents, describes and explores various two-dimensional shapes.

Key ideas:

Stage Two

SGS2.2a: Manipulates, compares, sketches and names two-dimensional shapes and describes their features.

Key ideas:
  • Identify and name pentagons, octagons, and parallelograms presented in different orientations.
  • Compare and describe special groups of quadrilaterals.
  • Make tessellating designs by reflecting, translating and rotating.
  • Find all lines of symmetry for a two-dimensional shape.

SGS2.2b: Identifies, compares and describes angles in practical situations.

Key ideas:
  • Recognise openings, slopes and turns as angles.
  • Describe angles using everyday language and the term 'right'.
  • Compare angles using informal means.

Stage Three

SGS3.2a: Manipulates, classifies and draws two-dimensional shapes and describes side and angle properties.

Key ideas:
  • Identify right-angled, isosceles, equilateral and scalene triangles.
  • Identify and draw regular and irregular two-dimensional shapes.
  • Identify and name parts of a circle.
  • Enlarge and reduce shapes, pictures and maps.
  • Identify shapes that have rotational symmetry.

SGS3.2b: Measures, constructs and classifies angles.

Key ideas:
  • Classify angles as right, acute, obtuse, reflex, straight, or a revolution.
  • Measure in degrees and construct angles using a protractor.