Do rectangular prisms and round shapes have perimeter?

Answer 1

Not sure how the perimeter of a solid object is defined. It cannot be a path around all the edges since even with a simple polyhedron - a cube - there is no route that does not require retracing or repeating an edge. Is it the sum of the edges' lengths? And would the definition extend to polyhedra in higher dimensions?

A round shape - in 2-dimensions - does have a perimeter.