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Angle of
Elevation
Definition of Angle of
Elevation
The word “elevation” means “rise” or “move up”.
Angle of elevation is
the angle between the horizontal and the line of sight to an object
above the horizontal.
Take a look at the
example below.
Example - Angle of
Elevation
In the picture below, an observer is standing
at the top of a building and looking straight ahead at the birds
(horizontal line). The observer must
raise his eyes to see the airplane (slanting line).
The angle formed
between the two
lines is called the angle of
elevation.
Solved Example on Angle
of
Elevation
The angle of elevation of the top of a pole
measures 48° from a point on the ground 18 ft away from its
base. Find the height of the flagpole.
Solution:
Step
1: Let’s first
visualize the
situation.
Step
2:
Let
‘x’ be the height of
the flagpole.
Step
4:
Þ x
= 18 × tan 48° = 18 × 1.11061… =
19.99102…»
20
Step
5:
So, the flagpole is
about 20 ft high.
Related Terms for Angle
of
Depression
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