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Stage 5 · Trigonometry C (Path) · Apply the sine, cosine and area rules to any triangle and solve related problems · Topic: Pythagoras & trigonometry · Year 9, 10

Solve problems involving finding unknown angles or sides in triangles (excluding right-angled triangles) by selecting and applying the appropriate rule

Dot point ID k-10-2022-stage-5-trigonometry-c-path/trc-sie-stg5-09 · NESA code MA_K_10_CP_TRC_SIE_STG5_09 · See it on the NSW Curriculum website ↗

↩SupportBuild the prerequisite skills first · 9 resources ★EnrichExtension & rich tasks · 1 resource

Outcomes for this focus area (MA5-TRG-P-01)

MA5-TRG-P-01 applies Pythagoras’ theorem and trigonometry to solve 3-dimensional problems and applies the sine, cosine and area rules to solve 2-dimensional problems, including bearings (Path: Stn, Adv)

Core resources for this dot point

On-level resources, grouped by type. Need the building blocks? Use Support. Ready for more? Use Enrich.

Interactive tool

Interactive toolStarter
Mathigon: Sine and cosine rules
Mathigon (Amplify) · Interactive (browser) · Free · Link checked 2026-10-15 · Hands-on, No prep
Use it for: Explore where the sine and cosine rules come from, then apply them.
Also tagged to: Use graphing applications to verify the sine rule a/sin⁡A = …; Use graphing applications to verify the cosine rule c² = a² …

Focus area resources

Checked resources for Trigonometry C (Path) as a whole (not mapped to a single dot point).

Unit/Planning
Stage 5 Unit 9 – surveying (sample unit of learning)
NSW Department of Education · Sample unit (DOCX) · Editable document · Free · Link checked 2026-10-15 · Australian context, Editable, Teacher notes
Outcome codes found in document: MA5-GEO-C-01, MA5-NLI-P-01, MA5-TRG-C-02, MA5-TRG-P-01