D x 2 x 1 2 y 2 y 1 2. Derived from the Pythagorean Theorem the distance formula is used to find the distance between two points in the plane. In a 2 dimensional plane the distance between points X 1 Y 1 and X 2 Y 2 is given by the Pythagorean theorem.
The distance between two points is the length of the line joining the two points in the coordinate plan.
For this take two points in XY plane as P and Q whose coordinates are P x1 y1 and Q x2 y2. This video covers finding the distance in the coordinate plane by using absolute value. The distance between two points is the length of the line joining the two points in the coordinate plan. The distance between two points AxA yA A x A y A and BxB yB B x B y B in two-dimensional Cartesian coordinate plane is the length of the segment connecting them AB dA B xB xA2 yB yA2 A B d A B x B - x A 2 y B - y A 2.