There should be two bases, 1 at the top and 1 at the bottom.
Chat with our AI personalities
triangle
There is no special name. In a prism it would be a quadrilateral, in an antiprism, a triangle.
A triangular prism has a base that is a triange; a triangle has three sides.
A prism has a variety of bases but the sides are always parallelograms. A triangular prism has a triangle as the two bases and parallelograms as lateral sides. A pyramid has a variety of bases but the sides are triangles.
Each and every prism has two parallel congruent bases. It is the shape of these bases that give the name to the prism: a pentagonal prism has pentagons (not necessarily regular) for its bases.