An observer standing on the top of a vertical spots a house in the adjacent valley at an angle of depression of 21 degrees. The cliff is 80 cm tall. How far is the house from the base of the cliff?
Answers
The angle of elevation is the angle between a horizontal line from the observer and the line of sight to an object that is above the horizontal line.
In the diagram below, AB is the horizontal line. θis the angle of elevation from the observer at Ato the object at C.
What is angle of depression?
The angle of depression is the angle between a horizontal line from the observer and the line of sight to an object that is below the horizontal line.
In the diagram below, PQ is the horizontal line. θis the angle of depression from the observer atP to the object at R.
How to define an angle of elevation or an angle of depression?
Find angles of depression and angles of elevation, and the relationship between them.
Angles of elevation and depression are equal.Show Step-by-step Solutions
Example:
In the diagram below, AB and CD are two vertical poles on horizontal ground. Draw in the angle of elevation of D from B and the angle of depression of C from B.
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