All angle of two similar regular polygons must be equal.
Yes, regular polygons will have all sides equal length, and all angles the same. If two polygons of the same number of sides are 'regular' then those two polygons will be similar (they may be scaled, for example).
Yes, the corresponding sides of two similar regular polygons must have equal lengths. This is because both the polygons are similar, which means that since they are also polygons, they must have equal lengths.
similar polygons may not be congruent (different sizes) congruent polygons are always similar (equal in every geometric respect - including
If they have the same nuber of sides (angles) then always. If not then never. So, overall, I suppose the answer is sometimes - depending on the number of sides.
Any two polygons with a different number of sides are not similar.
yes that is true.
It is simply a shape which has two bases which are regular polygons. There is no special name for such shapes.