Perimeter word problems made simple for 11+
21 October 2026
Perimeter word problems explained
Perimeter is the total distance around the outside of a shape. In 11+ maths, children are often asked to solve word problems that involve finding the perimeter of rectangles, squares, and other shapes.
Understanding how to approach these problems helps children feel confident when they appear in exams.
Why perimeter matters for the 11+
Perimeter word problems test more than just calculation. They also check if your child can read questions carefully, pick out the right information, and apply the correct method.
Practising these problems builds strong problem-solving skills for the 11+.
Worked example
Step 1: Identify the shape and the given lengths.
Imagine the question says: A rectangle has a length of 5 cm and a width of 4 cm. What is its perimeter?
Step 2: Recall how to find the perimeter.
For a rectangle, perimeter = length + width + length + width.
Step 3: Put in the numbers.
Perimeter = 5 cm + 4 cm + 5 cm + 4 cm
Step 4: Add them up.
5 + 4 + 5 + 4 = 18
The correct answer is 18 cm. This is the total distance around the rectangle.
Tips for practising at home
Encourage your child to underline key numbers and words in each problem. Talk through the steps together and check their working. Use real objects, like books or tables, to make perimeter problems more concrete.
Key insight: Regular practice with word problems helps children spot patterns and avoid common mistakes, such as missing a side or mixing up area with perimeter.
