Identify different types of triangle
I can identify different types of triangles and describe their properties.
Identify different types of triangle
I can identify different types of triangles and describe their properties.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- All triangles have 3 straight sides and 3 vertices.
- Equilateral triangles have 3 equal sides and 3 equal angles.
- Isosceles triangles have 2 equal sides and 2 equal angles.
- Scalene triangles have no equal sides and no equal angles.
Keywords
Equilateral triangle - Equilateral triangles have 3 equal sides and 3 equal angles.
Isosceles triangle - Isosceles triangles have 2 equal sides and 2 equal angles.
Scalene triangle - Scalene triangles have no equal sides and no equal angles.
Common misconception
Some children may find it harder to recognise the type of triangle when they are drawn in different positions and orientations.
Allow time for children to manipulate the triangles so that they can see them in different orientations and build their understanding of the properties of each type of triangle.
To help you plan your year 4 maths lesson on: Identify different types of triangle, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 4 maths lesson on: Identify different types of triangle, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
We use learning cycles to break down learning into key concepts or ideas linked to the learning outcome. Each learning cycle features explanations with checks for understanding and practice tasks with feedback. All of this is found in our slide decks, ready for you to download and edit. The practice tasks are also available as printable worksheets and some lessons have additional materials with extra material you might need for teaching the lesson.
The assessment exit quiz will test your pupils' understanding of the key learning points.
Our video is a tool for planning, showing how other teachers might teach the lesson, offering helpful tips, modelled explanations and inspiration for your own delivery in the classroom. Plus, you can set it as homework or revision for pupils and keep their learning on track by sharing an online pupil version of this lesson.
Explore more key stage 2 maths lessons from the Properties of 2D and 3D shapes and symmetry unit, dive into the full secondary maths curriculum, or learn more about lesson planning.
Licence
Lesson video
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Starter quiz
6 Questions
3
4
5
6
8
a quadrilateral.
a pentagon.
a hexagon.
an octagon.
Exit quiz
6 Questions
This triangle has no equal sides and no equal angles.
This triangle has three equal sides and three equal angles.
This triangle has two equal sides and two equal angles.
no equal sides and no equal angles
two equal sides and two equal angles
three equal sides and three equal angles