A triangular prism is a prism that has has triangular bases
It depends on what kind of prism you mean. For example, a rectangular prism has 6 bases and a triangular prism has 5 bases. A triangular prism only has two bases.
a triangular prism has to triangular bases while a rectangular prism has a rectangle as the bases.
a pentagonal prism has 2 bases
A triangular prism has 2 bases on it!
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.
A prism will always have at least TWO bases
A triangular prism
A triangular prism has triangular bases, a heagonal prism has ... you guessed it! ... hexagonal bases.
None. By definition, a triangular prism has triangular bases. If it had circular bases it would be a circular prism (cylinder).
A prism. A triangular prism has two congruent triangles as bases, rectangular prism, pentagonal prism, etc.
A heptagonal prism has two 7-sided bases.