Which letters of the alphabet are polygons?

Answer 1

It depends on the alphabet:

• Latin = NONE
  
• Greek = Δ
  
• Cyrillic = NONE
  
• Hebrew = ם (depending on the font)
  
• Arabic = NONE
  
• Korean = NONE

There are also a few chinese characters that can loosely be described as polygons, such as: 凸凹口囗

Answer 2

alphabets are groups of letters. It's possible that the letters of any alphabet can be arranged in the shape of a polygon.

Answer 3

There are none.