Not sure about the horizon number line but the horizontal line is sometimes called the x-axis.
Establish a horizon line and a vanishing point
vertical
a line lol not saying real ancer
If the horizon is on a level line of sight, a vertical line directly above the observer forms an angle of 90 degrees. 55 degrees would be quite high, being above 45 degrees.
where the ground and sky meet
No, the horizon is horizontal. A vertical line is perpendicular to the horizon.
The horizon line.
No Line on the Horizon was created in 2020-05.
* Linear Perspective * Horizon Line * Vanishing Point * Orthogonal * Horizontal * Vertical
A horizon and one can be seen from every point on Earth.
No Line on the Horizon - song - was created on 2009-02-27.
Not sure about the horizon number line but the horizontal line is sometimes called the x-axis.
horizon is STUPID
The term "horizon" existed before the naming of a horizontal line. The concept of the horizon, meaning the line where the earth meets the sky, has been around for centuries. The naming of a horizontal line likely came afterward as a way to describe a line that is parallel to the horizon.
If you're talking about sky as in sky on this planet, then your answer would be the horizon (the point were the ground meets the sky from any vantage point on the surface). Or you could be talking about the atmosphere, which is the boundary between the earth and space and keeps life alive, and air on earth.
Yes, it is. Think of the horizon. A horizontal line is parallel to the horizon.