According to the posted dimensions, is ABCD a trapezoid? It does not look like it.
Maybe ABCD is any quadrilateral other than a trapezoid?
its given sides are BC 160, AD 270, and DC 190. it also has angles ADC 75 degrees and angle BCD is 90 degrees. i started by tryin to cut it to make two triangles. my separation was from angle B across to D. which left me with triangles ABD and BCD. did i start off correctly? i need to find angle ABC and side AB