Given:
The diagram is given.
To find:
The angle of elevation.
Step-by-step explanation:
As we know,
The angle of elevation is an angle that is formed between the horizontal line and the line of sight.
If the line of sight is upward from the horizontal line, then the angle formed is an angle of elevation.
If the line of sight is downward from the horizontal line, then the angle formed is an angle of depression.
So, the angles of elevation are 1 and 3.
Final answer:
The angles of elevation are 1 and 3.