# Definition:Perspective

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## Definition

Let $A$ and $B$ be plane geometric figures.

### Perspective from Point

Let $A$ and $B$ be such that their points are in one-to-one correspondence such that the lines joining pairs of corresponding points pass through a single point $P$.

Then $A$ and $B$ are **in perspective from a point**, and that point is $P$.

### Perspective from Line

Let $A$ and $B$ be such that their points are in one-to-one correspondence such that the lines joining pairs of corresponding points lie on the same straight line $L$.

Then $A$ and $B$ are **in perspective from a line**, and that line is $L$.

## Also see

- Results about
**perspective**can be found**here**.

## Sources

- 1989: Ephraim J. Borowski and Jonathan M. Borwein:
*Dictionary of Mathematics*... (previous) ... (next):**perspective** - 2014: Christopher Clapham and James Nicholson:
*The Concise Oxford Dictionary of Mathematics*(5th ed.) ... (previous) ... (next):**perspective**