What shape has exactly four triangular faces?
the answer is tetrahedron
There are an infinite no of shapes that have exactly 4 triangular faces. The two commonest are a tetrahedron and an Egyptian pyramid. If the question is re-phrased to "What shape has exactly four faces, (all of which are triangular), then the only answer is a tetrahedron. An Egyptian pyramid has five faces - a square base and four triangular sides. It is regular (the apex is vertically above the center of the base) and…
i didnt really understand this question...but i believe what your trying to ask, which shape has 4 trianglular faces? and my answer is the pyramid i hope that is the answer your looking for. However, a pyramid as in Egypt, has a square base. The proper name for the shape with four triangular sides is a tetrahedron.