A hexagonal prism's base is called a hexagonal base. The names of prisms are given according to the shape of their bases. A hexagonal prism has a base that is shaped like a hexagon. Similarly, a pentagonal prism has a pentagonal base.
It's a Pentagonal Prism or Pyramid.
a pentagonal prism
pentagonal based prism
The lateral faces of a prism - pentagonal or other - are rectangular.
I have no clue.
The pentagonal prism has seven sides including the bases