# Circles - Circumference of a circle Part 2

HideShow resource information

- Created by: Jake Popple
- Created on: 03-04-12 12:31

Fullscreen

**The circumference is the length of the edge around a circle.**

**For any circle, the circumference is:**

**3.141592... x the diameter.**

**Or in symbols: C = (3.141592...)d.**

**This is true for all circles and so 3.1414592... is therefore a special, unique number, and we represent it with the Greek letter π.( The symbol π is called 'pi' in English and is pronounced 'pie').**

**So we can write the formula for the circumference of a circle as: C = πd.**

**However, the diameter is equal to 2 x radius, (2r), so we can also wrtie this formula as:**

**C**…

## Similar Mathematics resources:

Teacher recommended

## Comments

No comments have yet been made