What type of measurement refers to distance in a straight line?

Linear measurement refers to the distance measured in a straight line between two points. This type of measurement is fundamental in various fields, including construction, pipe fitting, and any type of geometry, as it provides a clear and direct way to quantify distance.

In practical applications, linear measurements are essential for ensuring that materials fit properly and that structures are built according to specified dimensions. For instance, in pipe fitting, knowing the precise length of pipes is crucial to ensure they fit together without any gaps or misalignment.

Other measurement types serve different purposes: angular measurement looks at the degrees of intersection between two lines, surface measurement gauges the area of a two-dimensional space, and volumetric measurement quantifies the three-dimensional space an object occupies. Each serves a specific function but does not apply to the straight-line distance between points like linear measurement does.