Circle geometry practice for 11+ maths
21 October 2026
Why practise circle geometry
Circle questions are a common part of 11+ maths papers. Knowing how to use circle formulas makes these questions less daunting and helps children solve them with confidence.
Key facts to remember
Children should know the basic parts of a circle: centre, radius, diameter and circumference. The two most important formulas are:
Circumference = 2 × π × radius Area = π × radius × radius
Worked example
Calculate the circumference of a circle with a radius of 7 cm.
Step 1: Write the formula. Circumference = 2 × π × radius
Step 2: Insert the radius. Circumference = 2 × π × 7
Step 3: Use π ≈ 3.14. Circumference = 2 × 3.14 × 7
Step 4: Multiply. 2 × 3.14 = 6.28, then 6.28 × 7 = 43.96
The correct answer is 43.96 cm.
Tips for regular practice
Encourage your child to practise both area and circumference questions. Mix up the numbers and ask them to find missing values, such as the radius if the circumference is given.
Key insight: Practising circle geometry helps children become familiar with formulas and problem-solving steps, which is essential for 11+ maths success.
Regular practice with a range of circle questions builds confidence and accuracy.
