(2) Answers
I don't think there is one. A triangular pyramid has 4 faces and 4 vertices, and a square pyramid has 4 faces and 5 vertices;
Maybe a 3 dimensional pentagon? Pentagon is part of this
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I don't think there is one. A triangular pyramid has 4 faces and 4 vertices, and a square pyramid has 4 faces and 5 vertices;
Maybe a 3 dimensional pentagon? Pentagon is part of this