Support · Stage 4 · Properties of geometrical figures

Support Classify and describe types of triangles based on their properties, including acute-angled, right-angled, obtuse-angled, equilateral, isosceles and scalene triangles

Resources for the prerequisite content of this dot point: earlier-stage (or earlier sub-level) dot points in the same strand that students usually need first. Use these to fill gaps before or alongside the core lesson.

Prerequisite links are draft mappings generated from the syllabus structure (earlier stage, same strand, closest content). They are being reviewed by teachers. Spot a poor match? Tell us.

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Prerequisite dot points

Identify and classify triangles as equilateral, isosceles or scalene triangles

Stage 3 · Two-dimensional spatial structure A Draft mapping

  • Interactive toolStarter
    Geoboard (Math Learning Center)
    The Math Learning Center · Interactive (browser) · Free · Link checked 2026-10-15 · No prep
    Use it for: Make triangles and parallelograms to compare areas.
  • Interactive toolStarter
    Mathsisfun: Triangles
    Maths Is Fun · Interactive (browser) · Free · Link checked 2026-10-15 · No prep
    Use it for: Triangle types with interactive diagrams.

Identify and describe angle size in degrees for the classifications acute, obtuse and reflex

Stage 3 · Geometric measure A Draft mapping

No checked resources on this prerequisite dot point yet.

Compare side and angle properties of triangles and quadrilaterals using measurement and symmetry

Stage 3 · Two-dimensional spatial structure A Draft mapping

  • Interactive toolStarter
    Mathsisfun: Quadrilaterals
    Maths Is Fun · Interactive (browser) · Free · Link checked 2026-10-15 · No prep
    Use it for: Draggable quadrilateral properties.