The Golden Gate Bridge is used for this exercise
The length of the thumb = 2 inches
The height of the Golden Gate Bridge = 220 ft
The eye is represented as E
The base of the thumb is represented as B
The tip of the thumb is represented as T
The bottom of the landmark is represented as L
The top of the landmark is represented as H
The diagram below shows the relationship between the Eye (E), the base of the thumb (B) and the tip of the thumb (T)
The diagram below shows the relationship between the eye (E), the bottom of the landmark (L), the top of the landmark (T)
The sketch showing overlapping triangles △EBT and △ELH