Year 8 · Phase 3 (Years 7-8) · Geometry
Angles
What the teaching sequence covers here
Prove that a triangle's interior angles sum to 180 degrees, generalise the interior angle sum for any polygon as 180(n - 2) degrees along with exterior angles summing to 360 degrees, and find unknown interior and exterior angles of polygons.
This is ChalkBee's own paraphrase of the official teaching sequence, not the Ministry's wording. Tahurangi curriculum content is Crown copyright, Ministry of Education, licensed CC BY-NC 4.0, so we describe it in our own words and cite the source: NZC Mathematics and Statistics Phase 3 (Years 7-8). Always check the official page for the exact requirement.
nz-p3-geo-04. The Ministry of Education does not assign alphanumeric codes to teaching-sequence statements; this id is a stable site-internal reference.Worksheet gap
ChalkBee does not yet have a suitably matched Year 8 worksheet for this part of the teaching sequence. You can still build practice from the worksheet generator, and we would rather show a gap than overclaim coverage.