Support · Stage 5 · Properties of geometrical figures B (Path)
Support Apply the results for the interior and exterior angles of polygons to solve problems involving polygons
Resources for the prerequisite content of this dot point: earlier-stage (or earlier sub-level) dot points in the same strand that students usually need first. Use these to fill gaps before or alongside the core lesson.
Prerequisite links are draft mappings generated from the syllabus structure (earlier stage, same strand, closest content). They are being reviewed by teachers. Spot a poor match? Tell us.
Prerequisite dot points
Prove that any exterior angle of a triangle equals the sum of the 2 interior opposite angles
Stage 4 · Properties of geometrical figures Draft mapping
- WorksheetDrillKuta free worksheet: The exterior angle theoremUse it for: Printable skills-practice sheet with answer key on the exterior angle theorem; good for drill or homework.
- 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.
Match the corresponding sides and angles of similar polygons
Stage 5 · Properties of geometrical figures A Draft mapping
- WorksheetDrillKuta free worksheet: Similar polygonsUse it for: Printable skills-practice sheet with answer key on similar polygons; good for drill or homework.
Determine the scale factor for pairs of similar polygons and circles
Stage 5 · Properties of geometrical figures A Draft mapping
- Interactive toolStarterMathigon: Dilations (enlargements)Use it for: Enlarge shapes about a centre and see how scale factor changes lengths.