Triangular based pyramid
Pyramid
pyramid
A triangular based pyramid would fit the given description
a polygonal prism or a polygond
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.
It is a pyramid
pyramid
pentagonal pyramid
Pyramid
A polygonal pyramid.
pyramid
pyramid
A triangular based pyramid would fit the given description
A 3D shape with one base and three faces can only have triangular faces.
a polygonal prism or a polygond
it's a pyramid with 5 sides.
A solid figure with a polygonal base and triangular faces that meet at a common point.