Understand that different shapes can have the same perimeter
I understand that different 2D shapes can have the same perimeter.
Understand that different shapes can have the same perimeter
I understand that different 2D shapes can have the same perimeter.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- Shapes that look different can have the same perimeter.
- You can draw or create more than one 2D shape with the same perimeter.
- Shapes with different numbers of sides can have the same perimeter.
Keywords
Polygon - A polygon is a 2D shape made up of 3 or more straight lines.
Perimeter - The distance around a two-dimensional shape.
Common misconception
Pupils will most likely understand that different shapes can and most often do have different perimeters. They may not realise that the perimeters can potentially be the same.
Allowing pupils to recreate perimeters using string or number rods and rearranging themselves to make a new shape is a powerful way of showing that different shapes can have equal perimeters.
To help you plan your year 4 maths lesson on: Understand that different shapes can have the same perimeter, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 4 maths lesson on: Understand that different shapes can have the same perimeter, 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 Perimeter 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
triangle
quadrilateral
pentagon
hexagon
Exit quiz
6 Questions
