triangles

Properties of Triangles

In this lesson, you will be able to identify the different types of angles such as acute angles, obtuse angles and right angles.

Target Age:

Lesson Overview

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

  1. Explore different types of triangles.
  2. Identify examples and non-examples of triangles to help them summarise the characteristics of a triangle: a closed, 2-D shape with three straight sides.
  3. Recognize the properties of different types of triangles.

Curriculum Alignment: Year 4 Geometry: Properties of shapes

  • Compare and classify geometric shapes, including quadrilaterals and triangles, based on their properties and sizes
Last updated on: February 26, 2026

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