Math Homework. Do It Faster, Learn It Better.
Segment Addition Postulate
The segment addition postulate is a fairly obvious-seeming postulate which states that:
If a point lies on a line segment , then .
That is, the distance from one endpoint to the other is the sum of the distances from the middle point to either endpoint.
Example:
Find the length in the figure shown.
By the Segment Addition Postulate, .
Substitute the given values.
Solve for .