Enrich · Stage 5 · Introduction to networks (Path)

Enrich Define a planar graph as any graph that can be drawn in the plane so that no 2 edges cross

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 Introduction to networks (Path)

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

• Interactive toolEnrichmentEnrich
  Mathigon: Handshakes and dating
  Mathigon (Amplify) · Interactive (browser) · Free · Link checked 2026-10-15 · Hands-on, No prep
  Use it for: Extension puzzles on counting edges and degree sums.
• Interactive toolEnrichmentEnrich
  Mathigon: Map colouring
  Mathigon (Amplify) · Interactive (browser) · Free · Link checked 2026-10-15 · Hands-on, No prep
  Use it for: Enrichment: four-colour theorem and planar graph faces.
• Rich taskEnrichmentEarly finishersEnrich
  NRICH: Eulerian
  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.