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Maths Exercices

Lengths of segments on number lines


DISTANCE FORMULA (ON NUMBER LINE)

The distance between two points is the absolute value of the difference between their coordinates.

If P has coordinate x1 and Q has coordinate x2,
PQ=|x2-x1|or|x1-x2|

 


What is the length of EF?

The coordinate of E is 2 and the coordinate of F is 5. The length of EF is the distance between E and F on the numberline.


So, EF = |5 – 2| = |3| = 3.


What is the length of DE?