They can but need not.
Not necessarily.
A regular dodecahedron, for example. Each face is a regular pentagon so no face has parallel sides. However, the edges on opposite faces are parallel to one another.
A dodecahedron can have 18 to 30 edges.
dodecahedron * * * * * A dodecahedron has 12 FACES, not 12 edges!
A dodecahedron has 0 parallel faces
A dodecahedron need not have any parallel lines.
A dodecahedron is a polyhedron with 12 faces, each of which is a regular pentagon. In a dodecahedron, the faces are not parallel to each other. The planes of the faces intersect at various angles, giving the dodecahedron its unique shape and properties.
it has 30 edges
22 edges.
When you say "sides", do you mean faces or edges? A dodecahedron has 12 faces and 30 edges.
Dodecahedron.
30