Fibonacci Spiral?
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 From:  bemfarmer 4 Dec 2018  (28 of 29) 
7356.28 In reply to 7356.27 
I recall from math class that the square root of 5 can be so constructed...
- Brian
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 From:  bemfarmer 4 Dec 2018  (29 of 29) 
7356.29 In reply to 7356.28 
According to this link, the answer is YES :-)
https://www.johndcook.com/blog/2017/05/01/golden-angle/

But the method is not given...

- Brian

After reading google links on "Constructible Angles," I'll conclude that construction of 137.5 degrees is NOT possible with compass and straigtedge...

EDITED: 4 Dec 2018 by BEMFARMER
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