Octangle vs. Octagon — What's the Difference?

A geometric figure with eight corners, an octagon.

In geometry, an octagon (from the Greek ὀκτάγωνον oktágōnon, "eight angles") is an eight-sided polygon or 8-gon. A regular octagon has Schläfli symbol {8} and can also be constructed as a quasiregular truncated square, t{4}, which alternates two types of edges.

A plane figure with eight straight sides and eight angles.

A polygon with eight sides and eight angles.

A polygon with eight sides and eight angles.

(martial arts) Often in the form Octagon: the arena for mixed martial arts.

A plane figure of eight sides and eight angles.

Any structure (as a fortification) or place with eight sides or angles.

An eight-sided polygon