What is the orientation of an angular measurement?

An angular measurement refers to the size of an angle formed by two intersecting lines or planes and is typically measured in degrees or radians. The orientation of such a measurement is not confined to just horizontal or vertical planes; instead, it can occur in any direction.

This means that an angle can be situated at any arbitrary direction, including those that may be diagonal or even at complex orientations in three-dimensional space. Therefore, saying that it is neither horizontal nor vertical best captures the nature of angular measurement, as it encompasses a broader range of possible orientations. This flexibility makes angular measurements essential for understanding various physical phenomena, such as rotational motion, wave propagation, and more.