References: 1  Royal College of Radiologists. 2  Swinson S, Tapp M, Brindley R, Chapman S, Offiah A, Johnson K. An audit of skeletal surveys for suspected non-accidental injury following publication of the British Society of Paediatric Radiology guidelines. 3  Offiah AC, Hall CM.
The question of distance between two straight lines arises only when they are parallel. The given lines are parallel. If the equations of parallel lines are ax + by + c = 0 and ax + by + c' = 0, then the perpendicular distance between them is given by. p = l c - c' l / sqrt ( a^2 + b^2 )
The distance formula is derived from the Pythagorean theorem. Distance between two points in a plane is calculated with the 2 coordinates (x1, y1) and (x2,y2). Draw a right angled triangle with the line formed by the points. The distance between the two points can be calculated by finding the horizontal (x2 - x1) and vertical distances (y2 - y1). Enter the coordinate values into this online Distance Between Two Points Calculator and find the length between the two points.