Areas of fertile soil called deltas, usually ...., are formed by mud deposited at the mouth of a river. A:triangular in shape B:triangular shape C:Their shape in triangular D:Triangular shape
___________________ I think choice A is the best, could it be changed to "in triangular shape" ?
oldersea you are right! both of your ideas are correct in grammar, it depends on what you want to emphasize! "in triangular shape" seems to be weaker in the emphasis of "Triangular" read it and feel again!!!!