Perimeter of a Rectangle: Step-by-Step Example
23 October 2026
Rectangles are common shapes in everyday life, and knowing how to find their perimeter is a key maths skill for the 11+. Here's a simple example to show your child how to work out the perimeter of a rectangle step by step.
Worked example
A rectangle has a length of 6 cm and a width of 4 cm. What is its perimeter?
Step 1: Add the length and width together. 6 + 4 = 10
Step 2: Multiply this answer by 2. 10 × 2 = 20
The correct answer is 20 cm.
After seeing this example, your child will be able to spot the sides of a rectangle and use them to find the perimeter. They can now try similar questions to build confidence with perimeter problems, just like those found in maths.com uk style practice.
