Use this Year 4 Perimeter of Polygons Teaching PowerPoint to show your class how to find the perimeter of irregular polygons.

Starting with a reminder of what an irregular shape is, children are shown how to calculate the perimeter of polygons where all sides are given. They then progress onto finding missing lengths before calculating the perimeter. They are encouraged to use efficient methods for adding strings of numbers throughout.

Ideal to guide your whole-class teaching, this carefully crafted learning sequence provides assessment opportunities at each stage so you can address any misconceptions during the lesson. A reasoning and a problem-solving question are included at the end, and the final slide provides links to our other resources in this step.

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This resource is designed to align to White Rose Maths version 3. Classroom Secrets Limited is not affiliated with, endorsed by, or in any way connected to White Rose Education Limited. Our products are original to Classroom Secrets Limited and any reference to White Rose Maths is solely for the purpose of indicating compatibility and does not imply any association with White Rose Education.