# Need help finding the points positions

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Hi there,

I've two circles defined by their positions BS1 and BS2.

Now I need to get the position of the point A and the only data I've is the distance from point BS1 that is defined by its radius.

Can someone please tell me how can I find the coordiinates of point A?

Here you can see a representation of the problem I need to solve http://imageshack.us/photo/my-images/542/002yw.png/

Thank you very much

PD: I need to do the same with point B.

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Vector center_to_center = BS1-BS2;
Vector direction = center_to_center / length(center_to_center);
Point A = BS1 + direction * R1; // R1=1 in your example
Point B = BS2 - direction * R2; // R2 = 3 in your example

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