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Ok im mistaken. This is a different book than the craft math book i thought it was.
Somewhere i have a different book written by a builder about how to frame a roof using a steel square. This is all about using a square but it is pretty formal geometry. The author is an educated architect.
The other one showed how to lay out a curved new england style church roof by iterating with a square, end product looked like an upside down boat.
Ill keep looking.
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