Area of a Square: Worked Example
22 October 2026
Understanding the area of a square is a key skill for 11+ maths. When your child learns how to calculate area, it helps them solve shape questions with confidence.
Worked example
Find the area of a square with side length 5 cm.
First, write down the length of one side. That is 5 cm.
To find the area of a square, use the formula: side × side.
Multiply 5 cm by 5 cm.
5 × 5 = 25
The area is 25 cm².
The correct answer is 25 square centimetres.
Key insight: Once your child knows how to use the side × side rule, they can work out the area for any square. This type of question is common in 11+ practice, and your child will see similar problems in their maths.com uk worksheets.
