Definition:Octagon
(Redirected from Definition:Octangle)
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Definition
An octagon is a polygon with exactly $8$ sides.
Regular Octagon
A regular octagon is an octagon which is both equilateral and equiangular.
That is, a regular polygon with $8$ sides.
That is, an octagon in which all the sides are the same length, and all the vertices have the same angle:
Also known as
An octagon can also be referred to as an octangle, but this is rare.
Linguistic Note
The word octagon derives from the Greek octa, meaning eight, and gon, deriving from the Greek for corner.
Sources
- 1989: Ephraim J. Borowski and Jonathan M. Borwein: Dictionary of Mathematics ... (previous) ... (next): octagon
- 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): octagon
- 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): octagon
- 2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.) ... (previous) ... (next): octagon
- 2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.) ... (previous) ... (next): polygon
- 2021: Richard Earl and James Nicholson: The Concise Oxford Dictionary of Mathematics (6th ed.) ... (previous) ... (next): polygon