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Circle Parts

In this worksheet, students must know the names of parts of circles, including radius, diameter and circumference and know that the diameter is twice the radius.

'Circle Parts' worksheet

Key stage:  KS 2

Year:  Year 4 11+ worksheets

Curriculum topic:   Maths and Numerical Reasoning

Curriculum subtopic:   2D Shapes: Circles, Angles and Bearings

Difficulty level:  

Worksheet Overview

A circle can be drawn using a pair of compasses.

The distance set between the point and the pencil tip is called the radius.

The point marks the centre of the circle.


Circle and radius


The distance straight across from one edge to the other, going through the centre, is called the diameter.


Circle and diameter


The diameter is twice as long as the radius.

The radius is half the length of the diameter.

When we draw a circle, the pencil line around the perimeter is called the circumference.

It is a curved line.


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