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IEVref:102-04-09ID:
Language:enStatus: Standard
Term: perpendicular, adj
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Definition: qualifies in a Euclidean space:

  • a straight line with respect to another straight line when their associated vectors are orthogonal;
  • a straight line with respect to a plane when the line is perpendicular to any line of the plane;
  • a plane with respect to another plane when it contains a straight line which is perpendicular to any line of the other plane

Note 1 to entry: Usual wordings for lines are "line A is perpendicular to line B", or "lines A and B are perpendicular", or " A and B are perpendicular lines". Similar wordings are used for the other cases.


Publication date:2008-08
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Internal notes:2017-02-20: Editorial revisions in accordance with the information provided in C00019 (IEV 102) - evaluation. JGO
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