Re: radius of a circle

On Oct 21, 2:54 pm, phicarre <gam...@bluewin.ch> wrote:
> Ok but if the distance is ALREADY computed by the formula sqrt(....) ?

Oh I see. You need to junk that and use the Haversine formula.

You can't use Pythagoras' theorem in spherical geometry, it's for
Euclidean (plane) geometry; and in any case a direct correlation of 1
degree = 111.2km (approximately) only applies if both your points are
on a Great Circle.

Andrew
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