In the figure above, the circles centered at $$O_{1}$$ and $$O_{2}$$ have radii of equal length. If $$O_{1}O_{2}=9$$ and AB=3, what is the circumference of the circle centered at $$O_{1}$$ ?
In the figure above, the circles centered at $$O_{1}$$ and $$O_{2}$$ have radii of equal length. If $$O_{1}O_{2}=9$$ and AB=3, what is the circumference of the circle centered at $$O_{1}$$ ?