Final answer:
Altitude is the angle measured above the horizon and it represents the height of an object or point in the sky from the observer's perspective.
Step-by-step explanation:
The angle measured above the horizon is called altitude. It represents the height of an object or point in the sky from the observer's perspective. The altitude can be measured using degrees, with 0° being at the horizon and 90° being at the zenith, the point directly overhead.