As shown in the figure, in the right angle trapezoid oabc, CB ‖ OA, CB = 8, OC = 8, ∠ OAB = 45 ° (1) calculate the coordinates of points a, B and C; (2) calculate the area of △ ABC

As shown in the figure, in the right angle trapezoid oabc, CB ‖ OA, CB = 8, OC = 8, ∠ OAB = 45 ° (1) calculate the coordinates of points a, B and C; (2) calculate the area of △ ABC

(1) As shown in the answer figure, OC = 8, so the coordinate of point C is (0,8). If BD ⊥ OA is used in D, then BD = OC = 8, because BC = 8, the coordinate of point B is (8,8), and because ∠ OAB = 45 °, the coordinates of point a are (16,0); (2)