Definition
At a right angle (90 degrees) to a line, plane, or surface; forming or positioned at a perfect right angle. In geometry, perpendicular lines or planes intersect at exactly 90 degrees.
Example Usage
The architect drew perpendicular walls to ensure the corners of the building formed perfect right angles.
Origin
From Latin perpendicularis, from perpendiculum (plumb line), itself from perpendere (to hang down).
Fun Fact
The concept of perpendicularity is foundational to Euclidean geometry and is essential in construction, engineering, and design.
Source: Definition backfill (hailey)
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