Tip: (1) From the figure, the symmetry of sum is: CA=CB, while the quadrilateral is a diamond, ∴AB=CB, ∴△CAB is an equilateral delta, ∴∠ Cab = ∴∠ CDA = 60, ∴∠. ∴ The coordinate of point A is 0﹚a﹙ 1, the coordinate of point B is 0﹚b﹙3, and the coordinate of point C is ﹙ 23 ﹚. (2) Let the parabolic analytical formula be y = ﹚. +√ 3, (3) Due to the upward translation along the symmetry axis, ∴ can be set as the analytical formula: y =-√ 3 √ x-2 √? +k, change the coordinates of point D to: -√ 3-0-2? +k = √ 3, ∴k=5√3, ∴ translation unit = 5 √ 3-√ 3 = 4 √ 3.