It depends what kind of prism:
Rectangular prism-rectangle
Could be circle too.
It depends on what kind of prism it is. If it is a rectangular prism, it's base is a rectangle. If it's a triangular prism, it's base will be a triangle. P.S.-If you have any other questions about prisms or geometry in general, feel free to ask me!
A rectangle
A triangular prism can have a square or triangular base.
Triangular
You can call it a "triangular prism" rather than "triangular based prism" ... saying a prism is "triangular" imply that the base is a triangle. There's no other name that I know of. A prism is just a 3d shape, so all you have to say is <type of shape> + prism to get the point across.
It depends on the shape of the base. A pyramid or a prism can have any polygonal shape as base and the formula for its area will depend on the shape. With other solid figures, the base may simply be the face tat the object happens to be "sitting" on: roll it and another face becomes the base.
Every prism has a base. For a triangular prism the base is a triangle.
depends on what kind of prism.
A triangular prism can have a square or triangular base.
is a prism named according to the shape of its base
Their base shape. For example a rectangular prism has base that is a rectangle. Guess what kind of base shape a triangular prism has? yes, triangle.
That depends on the shape of the base. A prism can have any sort of polygon for its base.
The base of a pentagonal prism is a pentagon. Just like a square pyramid has a square for a base, a pentagonal prism has a pentagon for a base.
It is normally rectangular in shape.
That depends on the shape of the base.
A square.
It is a rectangle.
prism
A triangular prism can have a square or triangular base, but faces are normally triangles. (I think)