To get their mind wrapped around negligence, Curt Varone points firefighters and officers in the direction of something with which they already are familiar: the fire triangle ...

Like the fire triangle, all of the elements can coexist without issue. It is when one of those elements is manipulated that there is a possibility of a mental health injury.

Historically, physicists created a graphical representation detailing the three elements of fire (fire triangle). In recent years, one more point has been added, creating the fire tetrahedron.

The second element of the fire triangle, oxygen, is fueled by strong, sustained winds. It carries oxygen and pushes flames toward other fuel sources.

There is no oxygen, so the sun is not really on fire! If you look at pictures of the sun, it can look like it is on fire.

Mark Levin, who produced "Triangle: Remembering The Fire," a documentary about the deadly blaze, said the lessons from the fire resonate to this day. "What's amazing is that 100 years after the ...

For a fire to exist it requires three elements to be in place Heat, Oxygen and Fuel. This is known as the Fire Triangle. The triangle shows what you need to ignite and burn a fire.