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 )
Calculating one-dimensional distance between two points when you know the value for each is a cinch. Simply use the formula d = |x2 - x1| . In this formula, you subtract x 1 from x 2, then take the absolute value of your answer to find the distance between x 1 and x 2.Typically, you'll want to use the one-dimensional distance formula when your two points lie on a number line or axis.1  Note that this formula uses absolute values (the  | |  symbols).imply use the formula d = â((x2 - x1)2 + (y2 - y1)2) . In this formula, you subtract the two x coordinates, square the result, subtract the y coordinates, square the result, then add the two intermediate results together and take the square root to find the distance between your two points.