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In geometry, perpendicular lines are defined as two lines that meet or intersect each other at right angles (90 ∘). The term ‘perpendicular’ originated from the Latin word ‘perpendicularis,’ meaning a plumb line. If two lines AB and CD are perpendicular, then we can write them as AB ⊥ CD.
Learn what are perpendicular lines, how to construct them, and their properties and examples. Find out the difference between perpendicular and parallel lines and real-life examples of perpendicularity.
Learn how to use algebra to find parallel and perpendicular lines with examples and exercises. Parallel lines have the same slope, perpendicular lines have negative reciprocal slopes, and vertical lines are parallel to themselves.
Learn what perpendicular lines are, how to draw them, and how to identify them. See the difference between perpendicular and parallel lines, and the symbols used to denote them.
Learn the definition, properties and examples of perpendicular lines in geometry. Find out how to identify, measure and construct perpendicular lines using angles, slopes and equations.
Perpendicular lines are lines that intersect to form 90^{\circ} angles (right angles). In diagrams, right angles are often marked with a small square at the point where the two lines intersect. This notation helps us to quickly identify them as perpendicular lines.
Sal determines which pairs out of a few given linear equations are perpendicular. Skip to main content If you're seeing this message, it means we're having trouble loading external resources on our website.
