Circle Geometry Problems for 11+ Maths: A Parent's Guide
19 October 2026
Why circle geometry matters
Circle geometry is a common topic in 11+ maths. Children are expected to understand the properties of circles, use formulas, and solve problems involving circumference and area. Supporting your child with targeted practice can boost their confidence and problem-solving skills.
A typical circle question
Many 11+ questions ask for the circumference or area of a circle. Children need to know the key formulas and how to apply them step by step.
Worked example
A circle has a radius of 5 cm.
Step 1: Find the circumference using the formula 2 × π × radius.
2 × π × 5 = 10 × π ≈ 31.42 cm
Step 2: Find the area using the formula π × radius².
π × 5² = π × 25 ≈ 78.54 cm²
The circumference is about 31.42 cm and the area is about 78.54 cm², both rounded to two decimal places.
What parents can do
Encourage your child to write out each step clearly. Remind them to check whether the question asks for circumference or area. Practising with different radii helps build confidence and speed.
Key insight: Focus on understanding when to use each formula and how to round answers correctly. This helps children avoid common mistakes and improves accuracy in circle geometry problems.
