_{1}, y

_{1}) and B (x

_{2}, y

_{2}), then the distance formula gives the distance between A and B

AB = √(x_{2}- x_{1})^{2}+ (y_{2}- y_{1})^{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