area of triangles

Area of any Triangle

Extend your learner’s knowledge of working out the area of a right-angled triangle to work out the area of any triangle.

Target Age:

Lesson Overview

By the end of this unit, learners will:

  • extend their knowledge of working out the area of a right-angled triangle to work out the are of any triangle;
  • identify that the perpendicular height is not always the length of one of the sides.

Curriculum Alignment: Year 6 Measurements:

  • Recognise that shapes with the same areas can have different perimeters and vice versa.
  • Recognise when it is possible to use formulae for the area and volume of shapes.
Last updated on: February 27, 2026

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