Spreadsheet with other people’s measurements as well as mine:
https://docs.google.com/spreadsheets/d/1jsoWsu1ZmLkedRxiHok-2Xpk44d-bu4Ci2cOr81Ke2c/edit?usp=sharing
Length of shadow:
120 7/8 inches = 3.070225 meters
Height of pole:
50 1/8 inches = 1.274445 meters
angle = arctangent ( p / s )
Where:
p is the length of the pole
s is the length of the shadow
angle = arctan ( 1.274445 / 3.070225) = 22.54325°
