What is segment addition postulate?

The segment addition postulate states that if a line segment is divided into two or more segments, then the lengths of the smaller segments add up to equal the length of the original segment. In other words, if you have a line segment AB and point C lies on AB, then AC + CB = AB. This postulate is a fundamental concept in geometry and is used to find the lengths of segments in various geometric problems. The segment addition postulate is often used in conjunction with other postulates and theorems to solve geometric problems.