A 3D pentagon shape is commonly referred to as a pentagonal prism. A pentagonal prism is a three-dimensional shape that has two parallel pentagonal bases and five rectangular lateral faces connecting the corresponding sides of the bases.
The pentagonal bases give the prism its distinctive shape, while the rectangular faces are perpendicular to the bases. This combination results in a solid figure that maintains the characteristics of a pentagon at both ends, creating a unique 3D form. In geometry, prisms are defined by the shape of their base, and since this prism’s base is a pentagon, it is named accordingly.