Step 1. A line linking the Hagia Sophia & Parthenon is drawn (green)
Step 2. A line from Parthenon to Library of Celsus (red)
Step 3. Drop a perpendicular yellow line from Library of Celsus to green line
The maths (a² + b² = c²) will check out of course. Because I created a triangle with a right angle. His argument is invalid!!
The rest of the authors videos are good but this one https://youtu.be/GpJYs8eZnVw is frankly bulldust :)
Namaste
