Question

The angle formed by the line of sight with the horizontal when it is above the horizontal level is:

• A. angle of elevation
• B. angle of depression
• C. right angle
• D. none of these

Hint:

Angle of Elevation: Eye moves upward from horizontal.
Angle of Depression: Eye moves downward from horizontal. Always relate angle of sight to horizontal reference.

Answer 1

The Correct Option is A

Step 1: Understand the concept of line of sight 
The line of sight is the straight line drawn from the eye of the observer to the object being observed. 
Step 2: Determine direction of observation 
The question says: "when it is above the horizontal level"
This means the observer is looking upward from the horizontal
Step 3: Identify the correct terminology 
If the observer looks above the horizontal: the angle formed is called the angle of elevation 
If the observer looks below the horizontal: the angle formed is called the angle of depression
Step 4: Eliminate incorrect options
(2) is angle of depression – not applicable here
(3) is right angle – not relevant 
(4) is "none of these" – incorrect