Yes and no,it depends if you are talking about a square pyramid or triangular. Parallel means straight lines that never meet no matter how far extended. And there are no straight lines that don't touch in a triangular pyramid so no for a triangular pyramid.But in a square pyramid, the base of the pyramid is, of course square and the two lines opposite each other do not touch, no matter how much you extend them, so yes -try it your self.
