Stage 4 · Properties of geometrical figures · Apply the properties of triangles and quadrilaterals · Topic: Geometry: shapes & angles · Year 7, 8
Prove that the interior angle sum of a triangle is 180° with or without digital tools
Dot point ID k-10-2022-stage-4-properties-of-geometrical-figures/pro-apt-stg4-01 · NESA code MA_K_10_CP_PRO_APT_STG4_01 · See it on the NSW Curriculum website ↗
Outcomes for this focus area (MA4-GEO-C-01)
MA4-GEO-C-01 identifies and applies the properties of triangles and quadrilaterals to solve problemsCore 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 toolEnrichmentDesmos GeometryUse it for: Construct and drag figures to test angle conjectures.
- Interactive toolEnrichmentGeoGebra ClassicUse it for: Dynamic geometry and graphing for constructions and proofs.
Worksheet
- Corbettmaths practice questions: Angles: full circle (at a point)Use it for: Free printable graded practice questions (with answers) on angles: full circle (at a point) for drill or a quick check.
- WorksheetDrillKuta free worksheet: Angle sum of triangles and quadrilateralsUse it for: Printable skills-practice sheet with answer key on angle sum of triangles and quadrilaterals; good for drill or homework.
- WorksheetDrillKuta free worksheet: Triangle angle sumUse it for: Printable skills-practice sheet with answer key on triangle angle sum; good for drill or homework.
Video
- VideoStarterCorbettmaths video: Angles: triangleUse it for: Short worked-example video on angles: triangle to model the method before practice or for flipped revision.
- VideoStarterEddie Woo (WooTube): Basic Properties of Geometrical Figures playlistUse it for: Sydney teacher Eddie Woo's recorded lessons on properties of geometrical figures; play a clip to model a method or for revision.
Focus area resources
Checked resources for Properties of geometrical figures as a whole (not mapped to a single dot point).