Loading please wait

The smart way to improve grades

Comprehensive & curriculum aligned

Try an activity or get started for free

Understand Circle Parts

In this worksheet, students will be asked to find parts of a circle, the diameter, radius and circumference.

'Understand Circle Parts' worksheet

Key stage:  KS 2

Year:  Year 6 Maths worksheets

Curriculum topic:   Geometry: Properties of Shapes

Curriculum subtopic:   Know Circle Parts

Popular topics:   Geometry worksheets

Difficulty level:  

Worksheet Overview

This activity is going to ask you to complete different questions all about circles.

A circle is a 2D shape, every point on a circle has the same fixed distance to the centre.


In Year 6, we learn about the parts of a circle.

Let's recap:



This circle shows the diameter, this is the length of the line through the centre, from one edge to another.

Circle showing diameter



This circle shows the radius, the radius is the distance from the centre of the circle to the outer edge.

The radius is half of the diameter so is fairly straightforward to calculate.


Circle showing radius




A circle's circumference is the distance around the edge.

Circle showing circumference



How to find the circumference of a circle

To find the circumference of a circle we have to use the formulae:


(2 x Image result for pi symbol x r)


Image result for pi symbol = pi = 3.14



So, let's find the circumference of this circle.

The radius is 5cm.

(2 x 3.14 x 5) = 

(6.28 x 5) = 31.4

The circumference is 31.4cm


Your turn!

What is EdPlace?

We're your National Curriculum aligned online education content provider helping each child succeed in English, maths and science from year 1 to GCSE. With an EdPlace account you’ll be able to track and measure progress, helping each child achieve their best. We build confidence and attainment by personalising each child’s learning at a level that suits them.

Get started

Popular Maths topics

Try an activity or get started for free