What's Vertical and Horizontal?

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. Conversely, a direction or plane is said to be horizontal if it is perpendicular to the vertical direction.

What is vertical and horizontal line?

A horizontal line is one which runs left-to-right across the page. In geometry, a horizontal line is one which runs from left to right across the page. ... A vertical line is perpendicular to a horizontal line. (See perpendicular lines).

Which way is vertical line?

The terms vertical and horizontal often describe directions: a vertical line goes up and down, and a horizontal line goes across. You can remember which direction is vertical by the letter, "v," which points down.