None because a tetrahedron is a triangular based pyramid which has 4 faces, 6 edges and 4 vertices.
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a tetrahedron has 3 Right angles
A tetrahedron has 4 faces and 4 vertices.A tetrahedron has 4 faces and 4 vertices.A tetrahedron has 4 faces and 4 vertices.A tetrahedron has 4 faces and 4 vertices.
There are four number of faces in a tetrahedron.
A truncated tetrahedron has eight 8 faces: 4 hexagonal faces and 4 triangular faces.
By definition, it has four faces.