Enrich · Stage 4 · Length

Enrich Establish the arc length formula (l = θ/360 × 2πr) where l is the arc length and θ is the angle subtended at the centre by the arc

Extension and enrichment for students who are ready to go deeper: rich tasks, problem solving and open-ended challenges.

← Back to core resources

Enrichment for this dot point

No enrichment tasks tagged to this exact dot point yet.

More enrichment in Length

Rich tasks tagged to other dot points in this focus area.

• Rich taskEnrichmentEarly finishersEnrich
  NRICH: Arclets
  NRICH (University of Cambridge) · Web page · Free · Link checked 2026-10-15 · Low floor high ceiling, Teacher notes
  Use it for: Low-floor, high-ceiling NRICH task extending this dot point; use for extension or a problem-solving lesson.
• Rich taskEnrichmentEarly finishersEnrich
  NRICH: Changing Areas, Changing Perimeters
  NRICH (University of Cambridge) · Web page · Free · Link checked 2026-10-15 · Low floor high ceiling, Teacher notes
  Use it for: Low-floor, high-ceiling NRICH task extending this dot point; use for extension or a problem-solving lesson.