What has served as a teaching tool to geometrically depict the relationship between fuel, air, and heat?

The fire triangle serves as a foundational teaching tool in fire science, effectively illustrating the essential components required for combustion: fuel, air, and heat. Each point of the triangle represents one of these elements, demonstrating that all three must be present for a fire to ignite and sustain itself. This simple yet powerful visual representation aids in understanding the necessary conditions for fire and the importance of removing one of these elements to extinguish a fire.

In practical applications, the fire triangle is used to inform safety measures and firefighting strategies by emphasizing that controlling or eliminating one or more components can prevent a fire from starting or can effectively extinguish it after it has begun. It is widely recognized in both educational settings and in the field, making it an important concept for anyone studying or working in fire protection and safety.