zero, for any tetrahedron, not just regular
I think it is only 3
A tetrahedron has 4 faces. A "regular tetrahedron" has an equilateral triangular base with three equilateral triangles as sides coming up from it.
Well, a tetrahedron has four sides. A regular tetrahedron is a triangular pyramid.
Yes. A tetrahedron is a closed 3-d shape with 4 triangular faces. In a regular polygon, each of these is an equilateral triangle.
In general, a regular polygon is not required for a normal tetrahedron.An equilateral triangle is required for a regular tetrahedron.
A Tetrahedron. The most common form of a tetrahedron is called a regular tetrahedron, or a pyramid
A triangular based pyramid which is a tetrahedron has 4 faces, 6 edges and 4 vertices
5 tetrahedron, cube, octahedron, dodecahedron, and Icosahedron