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sorry if this is a trivial question, or if it's been asked before, but I'm not good with math terminology so my googling doesn't give me much info.. I'm trying to work out a problem in order to recreate some functions that are missing from the public API of Google Earth. (If this is solved I'll post the results for the benefit of other GE users)

I have circle, with a known radius (center called C), and a point B outside a circle at a known distance. I also have a known angle from the point which projects at some point A on the circle's circumference. How can I calculate the angle ACB, i.e. the angle between the circle's center to B and the circle's center to A?

I (hope I've managed to) upload an image describing the problem.

Thanks a lot,

Jonas

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# Point outside circle, angle

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