The Washington Monument is 169 m high. To the nearest degree, find the approximate measure of the angle of elevation of the top when the base is viewed at a distance of 0.5 km.

The Washington Monument is 169 m high. To the nearest degree, find the approximate measure of the
angle of elevation of the top when the base is viewed at a distance of 0.5 km.
When the base is viewed from 0.5km, the figure looks like
tan x = 169/(0.5*1000) = 169/500
 x = 18.67deg.
169m...