Year 8 · Mathematics and statistics · Geometry
Angles with parallel lines and circles
Supplementary, complementary and vertically opposite angles, corresponding, alternate and co-interior angles, angle equations and circle parts.
Everything for this topic in one place
- 3D lesson: Angles with parallel lines and circles — Use 3D rods to find angles on straight lines, vertically opposite angles and angles made by parallel lines and a transversal, then measure circles.
- Teacher presentation — slides to put on the projector.
- Worksheets at three levels — Tūī (support), Kererū (core) and Kea (extension), each with an answer key on the last page.
- Online practice — assign it to your class in the Crateclass classroom and the results come back by themselves.
Written for Te Mātaiaho, Phase 3 (Years 7–8), with New Zealand places, money and native birds.
Try before you sign up
See a full 3D lesson, a game and printable worksheets with no account on the free samples page. Teachers who sign up by 18 December 2026 get everything free until 9 April 2027.
More Year 8 maths topics
Powers of 10 and negative exponents · Prime factors, square and cube roots · Negative numbers and order of operations · Multiplying fractions and fractions of amounts · Percentages and ratio · Budgets, discounts and finance plans · Linear equations and inequalities · Expanding, simplifying and factorising · Triangular, square and cube number patterns · Area, volume and unit conversions · Transformations, enlargement and map scales · Statistical investigations, outliers and skew · Tree diagrams and probability experiments