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Maths

Angles in Triangles

Find unknown angles in triangles using the angle sum of 180°.

MathsAge 11+25 minutes

What this topic covers

  • Use the angle sum of a triangle (180°) to find a missing angle.
  • Use isosceles and equilateral properties to find angles from one given.
  • Combine with angles on a straight line (exterior angles).

Core concept summaries

Key ConceptsThe Angle SumIsosceles and EquilateralExterior Angles; the Halving Trap

Practice formats pupils may meet

NeurofiED uses varied practice to help pupils apply the idea actively, check understanding and build confidence over time.

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