Maths Dictionary · SS 1
Angle of depression
Simple meaning
The angle you look DOWN through, measured from the horizontal, to see something below you.
Example
Looking down at a boat from the top of a cliff.
See it
From the Angles of Elevation and Depression lesson. Try moving things around.
height = 40 × tan 35° = 40 × 0.7002 = 28.01 m
Elevation (looking up) = depression (looking down): alternate angles between the two horizontal lines.
Angle θ35°
Distance40 m