Definition

Describing a line or surface that is at a right angle (90 degrees) to another line or surface, often used in geometry and architecture.

Example

The two walls met at a perpendicular angle, creating a perfect corner.

Conversation

Did you notice how those two lines on the graph are perpendicular?

Yeah, it makes it really easy to see the relationship between the variables.

I always found perpendicular lines so interesting in math class.

Same here! They give a nice clear structure to diagrams.

Synonyms & Antonyms

Definition

In a position that is at an angle of 90 degrees to a given line or surface.

Example

The two lines intersect at a perpendicular angle.

Conversation

Did you notice how that wall is built perpendicular to the floor?

Yeah, it makes the room look so much more spacious.

I think it’s interesting how angles can change the vibe of a room.

Definition

A line or plane that is at an angle of 90 degrees to another line or plane.

Example

The architect ensured that the walls were perpendicular to the floor.

Conversation

Have you ever tried to draw a perpendicular line freehand?

Not really, that sounds challenging!

I always end up with wobbly lines instead of a perfect perpendicular.

Root Explanation

Perpendicular is formed from "per-" (meaning through) and "pendere" (meaning to hang). The word describes lines or planes that hang or intersect at right angles, thus creating a relationship of being at right angles to each other.

Memory Tip

Think of lines that 'hang through' each other at a right angle — 'per-' means through, and 'pendere' means to hang.

Visually Confused Words