- Hexadecagon (Wikipedia)
In mathematics, a hexadecagon (sometimes called a hexakaidecagon or 16-gon) is a sixteen-sided polygon.
- Alpha (Wikipedia)
Alpha /ˈælfə/ (uppercase Α, lowercase α; Ancient Greek: ἄλφα, álpha, or Greek: άλφα, romanized: álfa) is the first letter of the Greek alphabet. In the system of Greek numerals, it has a value of one. Alpha is derived from the Phoenician letter aleph aleph, which is the West Semitic word for “ox”. Letters that arose from alpha include the Latin letter A and the Cyrillic letter А.