A hexahedron.
Pentagon 2d shape is a pentagon 3d object is a pyramid.
A 3D name for a pentagon is a pentagonal prism.
a pentagonal pyramid or a pentagonal prisim
It's a Pentagonal Prism or Pyramid.
A pentagonal pyramid.
It has a pentagon base and it is a pyramid
a 3D pentagon
Pentagon (and in 3d: triangular prism and tetrahedron.)
pyramid
The vertex of a 3D pentagon is 10. :)
Truncated pyramid.
a pyramid is 3d