What is a 104 sided polygon called?

Answer 1

A 104-sided polygon is called a hecatontakaitetragon. The naming convention for polygons follows the Greek numerical prefixes for the number of sides, with "hecta" meaning 100 and "takaitetra" meaning 4. Therefore, a 104-sided polygon combines these prefixes to form its name.

Answer 2

It's quite acceptable to call it a 104-agon but what's more important is knowing how to work out its properties.