ANGLES OF ELEVATION AND DEPRESSION
CONTENT
- Horizontal and Vertical Planes
- Angles of Elevation and Depression
- Measuring Angles of Elevation and Depression
- The Relationship between Angle of Elevation and Depression
- Scale Drawing
Horizontal and Vertical Planes
An horizontal plane lies (flat) in the same position as the ground while a vertical plane stands like a straight wall.
Angles of Elevation and Depression
Angle of Elevation
The angle that an observer would raise his or her line of sight above a horizontal line in order to see an object. The angle of elevation is the angle between the horizontal and the observer’s line of sight.
In the diagram above, the angle of elevation of the object from the observer is α0.
Angle of Depression
If the object is below the level of the observer, then the angle between the horizontal and the observer’s line of sight is called the angle of depression.
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