Are all pyramids platonic solids

Answer 1

no

Answer 2

No, because the base of the triangle can be basically any polygon, and only a triangle with an equilateral triangle is a platonic solid.

To be more specific, only a regular tetrahedron, in which all 4 triangular faces are equilateral, is a platonic solid. Any triangular pyramid is a tetrahedron, but not necessarily a regular tetrahedron. The pyramids in Egypt and Central America are square pyramids, by the way, not triangular.

Answer 3

No because only tetrahedron pyramids are Platonic Solids that have 4 triangular faces, 6 edges and 4 vertices