“We Need To Talk About Fifty-Five” by qntm, from the SCP Wiki. Source: https://scpwiki.com/we-need-to-talk-about-fifty-five. Licensed under CC-BY-SA.
Octagon (Wikipedia) In geometry, an octagon (from the Greek ὀκτάγωνον oktágōnon, “eight angles”) is an eight-sided polygon or 8-gon.