Fire Triangle

The three components required to ignite and then maintain a fire. These are Fuel (i.e. the combustible material), Heat, and Oxygen (actually an Oxidiser, which may not be oxygen but might be stronger a chemical element such as fluorine gas). With all three components there will be a chemical reaction and the fuel source combusts once the temperature reaches its ignition temperature. Removing one of these components will result in a fire being extinguished. It is also referred to as the Combustion Triangle.