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 )
3) We calculate the distance between a point on the Earth's surface and the Equator as the length of the arc of the meridian passing through this point and crossing the Equator.) We calculate the distance between a point on the Earth's surface and the Equator as the length of the arc of the meridian passing through this point and crossing the Equator.