A pentagonal pyramid.
Such a figure is a pyramid.
It is a pyramid
The figure is a pyramid and the base is a square.
It is a triangular prism.
A 3D shape with one base and three faces can only have triangular faces.
pyramid
A pyramid.
A pentagonal prism
pentagonal pyramid
Pyramid
A solid figure with a pentagon as its base and triangular faces is called a pentagonal prism. In this 3D shape, the two pentagonal bases are parallel and connected by five rectangular lateral faces. However, if you specifically mean a solid with a pentagonal base and triangular faces that converge at a single point, then it is known as a pentagonal pyramid.
A polygonal pyramid.