In general, no, but some can.
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yes it can roll
No, a triangular prism cannot roll because it does not have a circular cross-section like a cylinder or a sphere. Rolling requires a continuous curved surface that can rotate around an axis. A triangular prism has a polygonal cross-section with flat sides, so it would slide rather than roll.
A prism has the same cross section throughout its length no matter what form it may take i.e. a cubic prism, a cuboid prism, a triangular prism, a hexagonal prism, a cylindrical prism etc.
There can be a heptagonal prism or an octagonal prism, but there is no such thing as a hectagonal prism.
A rhombic prism or rhombohedron.A rhombic prism or rhombohedron.A rhombic prism or rhombohedron.A rhombic prism or rhombohedron.