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Perpendicular

From Encyclopedia of Mathematics
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to a given straight line (plane)

A straight line intersecting that straight line (plane) at right angles.

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Two lines intersecting at right angles are also said to be orthogonal or perpendicular (cf. also Perpendicular straight lines).

How to Cite This Entry:
Perpendicular. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Perpendicular&oldid=14970
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