🔢 Mathematics · Geometry
Measuring angles (age 9+)
Recognise angle measure as additive; find unknown angles by adding or subtracting on a diagram using equations with a symbol for the unknown
Typical age: 9–10 years
“If two angles sit next to each other on a straight line and one is 65°, can your child work out the other angle — knowing that angles on a straight line always add up to 180°?”
0 / 3 mastered
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Needs first
- Measuring anglesREQUIRED
Must measure angles before solving unknown angle problems
- Types of angles (age 8+)REQUIRED
Finding unknown angles using equations requires reading angle diagrams and interpreting arc marks and notation
- Angle Sum RulesREQUIRED
Must know angle facts (360°, 180°) to solve unknown angle problems