If you mean a pyramid with a four sided base, it is a square pyramid. If you mean one with four faces, it is a tetrahedron.
if its a four sided pyramid then four. if its a three sided pyramid then four.
A triangular pyramid A triangular pyramid has four sides - each of which is a triangle. There cannot be a three sided pyramid. If you mean a 3 sided Pyramid with its base being the forth side it would be a Quadrangle. A four-sided triangular solid is also called a tetrahedron, and two interlaced are called a Star Tetrahedron.
Its called a 9 sided pyramid.
Yes, its called a three sided pyramid
A tall four sides structure with a pyramid on the top was called
A pyramid is a four-sided 3D triangle
A 7 sided pyramid would be called a heptahedral or heptahedron.
An eight sided pyramid would be a heptagon-based pyramid.
i am not sure, but i think it is 4 sided.