All congruent figures are similar figures, and have identical sizes.
An hexagon
Suboxone
Hexagonal Prism
NO, there not
no
Congruent figures are similar - in sides as well as angles. Corresonding angles of similar figures congruent but their sides are not. The sides are all in some fixed ratio. [If that ratio is 1, the figures are congruent.]
Congruent figures are always similar. However, similar figures are only sometimes congruent.
If all angles of two polygons are the same the figures are similar (irrespective of rotation).
Yes, but they are more than similar - they are congruent.
No. There are some figures that don't have a name that are five sided.
No. Two figures are similar if they have same shape, and all the angles are equal; but they can have the sides of different sizes. I mean, similar figures may have different sizes, but must have the same shape.