altitude
A triangle has three altitudes.
It is the circumcentre of the triangle formed by the three points. Draw the perpendicular bisectors of two of the lines joining the three points. They will meet at the point that is equidistant from the three points.
Its perpendicular height
A triangle? Three lines that intersect in three points.
The altitude (elevation) of Carefree, AZ is 815 meters. This is the equivalent of 2,674 feet.
The altitude of Dewey, AZ is approximately 4,500 feet above sea level.
7,100 ft.
3440 feet
Tucson, Arizona - Elevation: 2,389 FT
Elevation: 6,910 FT (2,106 M)
704 feet above sea level
Boiling point decrease at high altitude.
Points that are located at the same elevation above sea level are said to be at the same altitude. points A, B, and C are at the same altitude.
The average elevation of Chandler, AZ is around 1,204 feet (367 meters) above sea level.
This is probably about the "horizon coordinate system". Or, it's sometimes called the horizontal coordinate system. The system uses "altitude" and "azimuth" as coordinates. The azimuth is normally measured from due North as zero. So, that's the "three reference points", probably. Altitude is the angular height of a star above the horizon. Azimuth is the angle of a star measured along the horizon, from the pole.
About three hours.