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Learning objective overview
Master Teaching Guide coverage for this objective.
Current NZC (2007)
GM5-5
New NZC (2026)
NZC26-P4-GEO-SHP-P-Y9-02
Resources
- Beta: Exercise 18.04, pgs 345 & 346
- Beta: Exercise 18.05, pgs 347 & 348
- Dr Austin Maths - Angle Rules Practice Grid: PDF
- Dr Austin Maths - Angle Rules Practice Grid: Answers
- Dr Austin Maths - Angles in Triangles Practice Grid: PDF
- Dr Austin Maths - Angles in Triangles Practice Grid: Answers
- CorbettMaths on basic angle rulesQuestions PDF · Answers
- CorbettMaths on angles in trianglesQuestions PDF · Answers
Terminology
- angles on a straight line
- angles around a point
- vertically opposite angles
- full revolution
- triangle angle sum
- scalene triangle
- isosceles triangle
- equilateral triangle
Task goals
- Calculate a missing angle on a straight line using the fact that angles on a line sum to 180 degrees.
- Calculate a missing angle around a point using the fact that angles around a point sum to 360 degrees.
- Identify vertically opposite angles formed by two intersecting lines and explain why they are equal.
- Find a missing angle in a triangle given the other two, using the fact that angles in a triangle sum to 180 degrees.
- Combine two or more of these rules to solve multi-step angle problems, including problems that use algebraic expressions or ratios.
Where this fits
What leads into this objective, and where it goes next.
Before
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Basic angle rules
Also under GM5-5:
For teachers
Need the fuller teaching notes for this objective? Open the Teacher guidance PDF.