Perimeter calculation exercises for 11+ Maths: A parent's guide
19 October 2026
Understanding perimeter for 11+ exams
Perimeter is the total distance around the outside of a shape. In 11+ Maths, children are often asked to calculate the perimeter of rectangles, squares, and more complex shapes. This skill is essential for both GL and CEM style questions, where accuracy and methodical working are key.
What to expect in GL and CEM questions
GL and CEM exam boards present perimeter questions in slightly different ways. GL questions may focus on straightforward calculations for rectangles or squares, while CEM papers often introduce compound shapes or word problems. Both styles require careful addition of all side lengths, sometimes with missing measurements to deduce.
Practical examples to try at home
Start with simple shapes: for a rectangle, add the lengths of all four sides (or use 2 × [length + width]). For a square, multiply one side by four. For compound shapes, break the figure into familiar parts, find any missing sides, and add every outer edge. Practising these steps helps build confidence and accuracy.
Key insight: Encourage your child to double-check that every side is counted once, and that all measurements use the same unit. A systematic approach reduces errors, especially under exam pressure.
Where to find targeted perimeter practice
EB Maths offers dedicated interactive packs for perimeter, tailored to 11+ preparation. The '11+ Maths: Calculating Perimeter (GL & CEM style)' package covers core skills, and the 'Compound Shape Perimeter Practice' pack provides extra challenge for more complex questions. Both are designed for independent or guided practice at home.
Supporting your child's learning
Regular short practice sessions, with a focus on careful working and clear reasoning, can make a real difference. Discuss strategies together and encourage your child to explain their steps. This helps spot mistakes and strengthens understanding.
