fire triangle

From fire +‎ triangle.

fire triangle (plural fire triangles)

1. The three elements necessary and sufficient to sustain a fire: fuel (e.g. wood or petrol/gasoline), oxidizer (e.g. oxygen), and sufficient heat (e.g. reaction temperature or activation energy).
2. The diagram representing these three elements of a fire.
3. A fire and its three components. (Can we add an example for this sense?)

• combustion triangle

• fire tetrahedron