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.
Examples of Angle of Elevation
- IIn 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.
Video Examples: Angles of Elevation
Solved Example Clockple on Angle of Elevation
Ques: The angle of elevation of the top of a pole measures 480 from a point on the ground 18 ft away from its base. Find the height of the flagpole.
Step 1: Let's first visualize the situation.
Step 2: Let 'x' be the height of the flagpole.
Step 4: x = 18 × tan 480 = 18 × 1.11061 = 19.99102...>> 20
Step 5: So, the flagpole is about 20 ft high.