No. But if you restrict yourself to regular pentagons, then all regular pentagons are similar.
10
5
No more similar than every Italian is to every other Italian.
10
A pentagon has 5 sides.A regular pentagon has every side the same length.Perimeter = 5 x 3s= 15 s(whatever unit a s is, other than a second.)
square and rhombus
Every rectangle is similar in that they both have 4 sides, they both have 4 angles, and they both have 2 sides equalling one length and the other 2 sides equalling a shorter length. Every two rectangles are similar in a way but they are not all exactly the same.
Only if they both have the same ratio of length to width. Since every square has the same ratio of length to width ( it's 1 ), all squares are similar. Gee, when you think about it, every regular polygon is similar to every other regular polygon with the same number of sides. I never realized that.
The 12 pentagons each have 5 vertices, none share vertices with any other pentagon. Every hexagon vertex is a shared one with a pentagon, so ignore them to avoid repeats. 12 * 5 = 60 vertices.
only on thursdays of every other week of every other month of every other year.
every other friday
Since every nation's economy depends so much on its imports and exports, every country has the similar if not the same goods as others, so the Polish receive presents similar to people in all other nations.