A pyramid
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4 triangular lateral faces
A triangular prism would fit the given description
no, it's a pyramid
A square pyramid
A triangular prism has two triangular bases and three lateral rectangular faces. It has five faces in all so that it is a pentahedron.A triangular pyramid has a triangular base and three triangular lateral faces. It has 4 faces in all so that it is a tetrahedron.