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I'm reading conflicting uses of the term "Radial Separation."

On this math forum it is implied to be "the distance between circles" as well as "the distance between the circles of the spiral".

A local ByLaw implies the meaning is distance between two places.

I'm looking for a definitive correct interpretation.

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up vote 1 down vote accepted

Good luck. Here is my own interpretation, not definitive and possibly not correct:

Given some central reference point $A$, the radial separation between locations $X$ and $Y$ is the number of degrees (or radians, if you prefer) in the angle $XAY$.

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