As shown in the figure, in the trapezoid ABCD, BC ‖ ad, ab = BC = CD = 2, ad = 4. The known point a coordinates are (- 2,0). Try to find the other three vertex coordinates of the trapezoid ABCD
D (2.0) B (- 1, radical 3), C (1, radical 3)
D (2.0) B (- 1, radical 3), C (1, radical 3)