Question

what is vertical direction?​

Answer 1

here is your answer

☞ a direction or plane passing by a given point is said to be vertical if it contains the local gravity direction at that point. ... Conversely, a direction or plane is said to be horizontal if it is perpendicular to the vertical direction.

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Answer 2

Answer: In astronomy, geography, and related sciences and contexts, a direction or plane passing by a given point is said to be vertical if it contains the local gravity direction at that point. [1] Conversely, a direction or plane is said to be horizontal if it is perpendicular to the vertical direction. In general, something that is vertical can be drawn from up to down (or down to up), such as the y-axis in the Cartesian coordinate system.Girard Desargues defined the vertical to be perpendicular to the horizon in his 1636 book Perspective.

The word horizontal is derived from horizon,[2] whereas vertical originates in the late Latin verticalis, which is from the same root as vertex, meaning "highest point".

Explanation: