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The term that best describes it is an "oxymoron". A solid shape with one base opposite a single point is not a prism so such an object cannot exist.
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A pyramid has a single polygonal face as its base.
A pyramid with a line rather than a single point for its apex. Basically a long pyramid, imagine if you stretched a pyramid and its apex stretched from a point - into a line -------.
Not true. They have only one base and several (3 or more) lateral triangular faces. A pyramid has a single vertex over a base - there are no parallel faces in any pyramid.