Angular Distance

The angular distance is the smallest distance between two points of a circle. Generalized in three dimensions, it returns to the problem of the Distance of the large circle. The perimeter of a circle can be regarded as a length (surface of dimension 1): a point of the circle thus has only one property, the angle, noted α.

That is to say two points, has (angle α) and B (angle β), of a circle of radius R, then the angular distance between these two points is:

$D\; =\; R\; \backslash \; times\; |\; \backslash \; alpha\; -\; \backslash \; beta\; |$

See too

• concept of distance, in Mathematical;
• the Distance from the large circle, in three dimensions;
• the angular concept of distance in Cosmology.

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