It is related to the distance. D x 2 x 1 2 y 2 y 1 2. Use the distance formula.
It is called distance formula and used to find distance between any points in a plane.
D x 2 x 1 2 y 2 y 1 2. D x2 x12 y2 y12 Where D is the distance between the points. Use the distance formula. The same symbol not in bold represents the magnitude of the vector D indicates change for example Dv v 2 v 1 t time.