If three points are on a straight line, we can use the Segment Addition Postulate to calculate the total length of the segment.
x=10
Practice makes perfect
The length JK is the total length of the segment, JK.
Because point H is on a straight line between J and K, we can use the Segment Addition Postulate to create an equation that we can use to solve for x.
JK = JH + HK
Let's substitute the given expressions into our equation and solve.
