> In quadrilateral ABCD, AB,BC,CD and AD are sides > whereas > BD and AC are diagonals .BD and AC intersect at P > such that BC=AP.Angle BAC=20 degree and AB=AC.Angle > CAD= > 140 degree.Find angle ADC.
A careful sketchpad drawing reveals that the ray from B through P does not meet the ray from A at the angle 140 degrees from the ray AC.
In other words, unless I'm mistaken, the data are not consistent... ???