Line Segment Addition Postulate (Geometry Math)

In the early parts of your geometry course you will begin talking about postulates. These are statements that are just accepted and do not have to be proven. In this video I go over the Segment Addition Postulate which states if B is between A and C on a line segment, then AB+BC=AC. I give two examples of this being worked out. The first example I am using constants to explain the postulate. Then I show how algebra is used to work out a problem with unknowns (variables) in expressions.