A Cylinder
cylinder is the name for a circular prism
That's a "lens".
It is a cylinder
A cylinder
A circle prism is called a circular prism not a cylinder
lens
None. By definition, a triangular prism has triangular bases. If it had circular bases it would be a circular prism (cylinder).
There is no such thing as a circular prism you're probably thinking of a cylinder or a cube
Cylinder (circular prism) Cube (square prism) Cuboid (rectangle prism)
No, a cylinder is.
A Cylinder
a cylinder has to have a circular base because it is a circular prism