HI Crosbie Yes, the VIN / Chassis number are the same. Some are now diplayed on the dash board for authorities to check. If there are different in any way, contact you local DVLA office or VOSA for clarification, just in case.... Hope this helps...
In case of a two dimensional plane, two intersecting lines are said to be perpendicular lines if they intersect at right angles. In the figure, the lines $\overleftrightarrow{AB}$ and $\overleftrightarrow{CD}$ are perpendicular to each other intersecting at the point P. We can write.
In fact, the product of the slopes of any pair of perpendicular lines is -1. So if we have any two perpendicular lines, we can call their slopes m 1 and m 2 and write this fact as an equation: We can use this equation to check whether or not two lines are perpendicular without trying to measure the angle between them.