None. By definition, a triangular prism has triangular bases. If it had circular bases it would be a circular prism (cylinder).
none
There is no such thing as a circular prism you're probably thinking of a cylinder or a cube
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 2 bases on it!
a pentagonal prism has 2 bases
There are many possible answers: a frustrum of a cone, a sphere or torus intersected by a pair of parallel planes, a circular prism (cylinder) are some.
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 heptagonal prism has two 7-sided bases.
It has 4 bases.
It has 5 bases
A rectangular pyramid has no circular bases.