"Vertical" and "horizontal" are terms used to describe directions or orientations in space. 1. **Vertical**: - Vertical refers to a direction that is oriented up and down. It is perpendicular to the horizontal plane. In a typical Cartesian coordinate system, the vertical direction often aligns with the y-axis. For example, when you think of a tall building or a tree, those objects have a vertical orientation because they rise straight up toward the sky.
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