What are the three components of the Fire Triangle? Objective By the end of the lesson, students will be able to: construct a geometric triangle, name the components of the Fire Triangle, explain that removal of one component of the Fire Triangle extinguishes the fire. Background Fire can occur only if oxygen, fuel, and heat are available. These three components are called the “fire triangle.” This activity is from the USDA Forest Service “Fire Lab” curriculum . Find more wildfire lesson plans on this USFS website . The educational FireWorks trunk and materials that go with this curriculum are Duration: 60 Minutes.