Learning objective overview
Master Teaching Guide coverage for this objective.
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.
Key skills
- Angles on a line
- Angles around a point
- Vertically opposite angles
- Triangle angle sum
Quick stats
- 81 total questions
- 3 difficulty levels
- Answers included
For teachers
Need the fuller teaching notes for this objective? Open the Teacher guidance PDF.