Find the length of the common chord of the two circles x2+y2=1x^2 + y^2 = 1x2+y2=1 and (x−1)2+y2=1(x-1)^2 + y^2 = 1(x−1)2+y2=1.
3\sqrt{3}3
32\frac{\sqrt{3}}{2}23
111
22\frac{\sqrt{2}}{2}22