The distance formula enables one to find the distance between two points, given the coordinates of the two points. Let there be two points whose coordinates are A (x
1, y
1) and B (x
2, y
2), then the distance formula gives the distance between A and B
AB = √
(x2 - x1)2 + (y2 - y1)2
For example, if there are two points on a coordinate plane A (1, 2) and B (3, 4), distance between them is computed as follows:
AB =
√
(3 - 1)2 + (4 - 2)2
Simplifying it, AB = 2√
2