# Definition:Linear Measure/Distance

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## Definition

The **distance** between two points $A$ and $B$ in space is defined as the length of a straight line that would be drawn from $A$ to $B$.

## Also defined as

The term distance has a specialized meaning in analysis which has an immediate practical application in analytic geometry.

## Sources

- 1947: William H. McCrea:
*Analytical Geometry of Three Dimensions*(2nd ed.) ... (previous) ... (next): Chapter $\text {I}$: Coordinate System: Directions: $\S 1$. Introductory: Metrical geometry