<image>△ABC is positioned in the Cartesian coordinate system as shown in the figure, where each small square has a side length of 1 unit.
(1) Translate △ABC 2 units to the right and draw the translated triangle △A_{1}B_{1}C_{1};
(2) If △ABC is rotated 180° around the point (-1,0), resulting in △A_{2}B_{2}C_{2}, draw the rotated triangle △A_{2}B_{2}C_{2};
(3) Observe the relative positions of △A_{1}B_{1}C_{1} and △A_{2}B_{2}C_{2}:
① The positional relationship between line segments A_{1}C_{1} and A_{2}C_{2} is _______, and the area of quadrilateral A_{1}C_{1}A_{2}C_{2} is ______;
② Are △A_{1}B_{1}C_{1} and △A_{2}B_{2}C_{2} centrally symmetric about a certain point? If so, please write the coordinates of the center of symmetry; if not, explain why.