Yes and a triangular based pyramid is a tetrahedron
Yes.
A polyhedron is a solid shape with four or more polygonal faces. A hexahedron is a solid shape with six polygonal faces and so is a particular type of polyhedron.
It is a Pentahedron.
This polyhedron has 7 vertices and 12 edges.
The answer depends on how it is "moved". However, hexagons cannot make a polyhedron.
One with 20 polygonal faces.
in 1983
No, it is false.
an octahedron
It can be any type of pyramid.
No, they are the faces of the polyhedron.
The most famous are in Egypt.