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Angles of Elevation and Depression
The angle of ELEVATION is the angle between the
horizontal and the line of sight to an object
line
of
sight
Horizontal line
The angle of ELEVATION is the angle between the
horizontal and the line of sight to an object
line
of
sight
?
Horizontal line
?
The angle of ELEVATION is the angle between the
horizontal and the line of sight to an object
1
line
of
sight
2
angle 1
angle 2
 both angles
Which is the
angle of elevation?
Horizontal line
The angle of DEPRESSION is the angle between the
horizontal and the line of sight to an object
horizontal
The angle of DEPRESSION is the angle between the
horizontal and the line of sight to an object
line
of sight
?
horizontal
?
Click the angle of depression
k
k
k
k
horizontal
screen shot at pm
 sight
horizontal
depression
elevation
The pink line is called the 
line of
line of sight
In this diagram, the angles of elevation and depression
are ALTERNATE INTERIOR angles.

Therefore, they are congruent, meaning their measures are
                 .
screen shot at pm
line of sight
?
angle of depression
?
angle of elevation
?
Horizontal
?
Horizontal
same horizontal
The angles of elevation
and depression can
use the same
horizontal line:
screen shot at pm
Label the diagram.
angle of depression
?
angle of elevation
?
horizontal line
?
screen shot at pm
The angle
of elevation
is 
The angle of
depression 
is 
These angles
are alternate
interior angles;
Their measures
are
screen shot at pm
What is the measure of the angle of elevation? 
º
screen shot at pm
What is the measure of the angle of depression? 
50º
º
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