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{{ printedBook.courseTrack.name }} {{ printedBook.name }} If two points are matched with numbers on a ruler, the distance between the points is given by the absolute value of the difference between the numbers.

In this case, $A$ is matched with $2$ and $B$ is matched with $8.$ $AB=∣2−8∣=6$ $A$ and $B$ are $6$ centimeters apart.