A triangular pyramid has four faces, and is referred to as a tetrahedron if the faces ale all equilateral triangles.
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The only pyramid with exactly four faces is the triangular pyramid.
if its a four sided pyramid then four. if its a three sided pyramid then four.
The faces are the flat, triangle-shaped surfaces that make up the surface of the pyramid. A pyramid has four faces.
A triangular pyramid has four triangular faces.
Four faces four vertices