Some are some are not. Two regular pentagons with one equal side are congruent.
Yes. One can have congruent pentagons.
Yes providing that they are regular 5 sided pentagons otherwise no if they are irregular pentagons
It should have a pair of congruent pentagons. Of the five faces along the axes all, some or none may be congruent.
you don't
An object with 2 congruent pentagons at opposite ends connected with 5 rectangles is a pentagonal prism.
A polyhedron with 12 congruent faces is a dodecahedron.
Yes
Sometimes. For a regular pentagon, all the sides and interior angles are congruent. However, this isn't the case for some pentagons.
If they are congruent they must be similar.
A dodecahedron.
A pentagonal prism.