At which points do the circles (x - 1)2 + (y - 1)2 = 4 and x2 + (y - 2)2 = 2 intersect?

1/2(2*4)=6 $$- agahajakanajak

in the simple case, the two triangles point x and y are congruent because every corresponding side has the same length, and every corresponding angle has the same measure.