Perimeter of Composite Shapes | GCSE Maths (Step-by-Step)

Perimeter of composite shapes is one of the most common and challenging GCSE Maths exam topics. In this lesson, you will learn perimeter of composite shapes using a clear step-by-step method that works in real exam questions.

This video explains perimeter of composite shapes by breaking complex figures into simple shapes, identifying all the outer edges, and adding only the correct side lengths. You will see worked examples where missing lengths must be calculated before finding the final perimeter, exactly as required in GCSE exams.

We also focus on common exam mistakes, such as adding internal sides or forgetting hidden edges. By understanding how to trace the outside boundary of a composite shape, you will be able to approach perimeter questions with confidence and accuracy.

This lesson is ideal for GCSE Maths revision, IGCSE students, and KS3 learners preparing for exams. It is especially useful for students aiming for higher grades, where composite shapes often appear in multi-step questions.

👉 Watch carefully, practise the examples, and strengthen your exam technique.

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