Stage 5 · Properties of geometrical figures B (Path) · Apply logical reasoning to numerical problems involving plane shapes · Topic: Geometry: shapes & angles · Year 9, 10
Apply the result for the sum of the interior angles of a triangle to find, by dissection, the sum of the interior angles of a polygon with more than 3 sides
Dot point ID k-10-2022-stage-5-properties-of-geometrical-figures-b-path/prg-lms-stg5-04 · NESA code MA_K_10_CP_PRG_LMS_STG5_04 · See it on the NSW Curriculum website ↗
↩SupportBuild the prerequisite skills first · 10 resources★EnrichExtension & rich tasks · 3 resources
Outcomes for this focus area (MA5-GEO-P-01)
MA5-GEO-P-01 establishes conditions for congruent triangles and similar triangles and solves problems relating to properties of similar figures and plane shapes (Path: Ext)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 toolStarterMathigon: PolygonsUse it for: Discover the interior angle sum of polygons.
- Interactive toolStarterMathsisfun: Interior angles of polygonsUse it for: Interior/exterior angle sums, interactive.
Worksheet
- Corbettmaths practice questions: Angles: polygonsUse it for: Free printable graded practice questions (with answers) on angles: polygons for drill or a quick check.
Video
- VideoStarterCorbettmaths video: Angles: polygonsUse it for: Short worked-example video on angles: polygons to model the method before practice or for flipped revision.
Focus area resources
Checked resources for Properties of geometrical figures B (Path) as a whole (not mapped to a single dot point).