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Calculating Angles in a Triangle

Apply the properties of angles in a triangle to calculate unknown angles with this highly engaging maths lesson with differentiated self-marking activities.
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angles in a triangle
Description

By the end of this unit, students will be able to:

  • learn that the interior angles of a triangle add up to 180 degrees;
  • use this rule to work out unknown angles in a triangle.

Year 6 Geometry: Properties of shapes

  • Compare and classify geometric shapes based on their properties and sizes and find unknown angles in any triangles, quadrilaterals, and regular polygons.
  • Age: 9-11
  • England & Wales: Year 5-6
  • Scotland: Primary 5-6
  • Rep. Ireland: Fourth-Fifth Class
  • Australia: Grade 4-5
  • USA: Grade 4-5
  • Three-part Lesson
  • Self-marking Activities
  • Fluency, Reasoning and Problem-solving Questions.
  • Engaging Drag and Drop Activities
  • Interactive Self-marking Worksheet
  • Printable Worksheets to Consolidate Learning

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