Two bases and three vertical sides make 5 faces.
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A triangular pyramid has four triangular faces.
1. triangular prism it has 2 triangular faces. 2.triangular base pyramid, it has 5 triangular faces. 3. square base pyramid, it has 4 triangular faces.
There are infinitely many polyhedra all of whose faces are triangular.
There are three rectangular faces in a triangular prism.
A pentagonal pyramid has 5 triangular faces and 0 rectangular faces.