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.
When two lines are perpendicular, the slope of one is the negative reciprocal of the other. If the slope of one line is m, the slope of the other is. Try this Drag points C or D. Note the slopes when the lines are at right angles to each other.