>>14023181Well, mayble if you drew your sketch better, so that OAK really is 60deg, you might have an easier time solving it. As for help - let the center of the small circle be point P, then angle OAP is 30deg, since P is distance r from both AO and AK. Since the circles are touching, PO is R+r. Draw helper triangles often! Hope this helps a bit.
