File:Regular_polygon_8_annotated.svg · Wikimedia Commons · See Wikimedia Commons
octagon
Sign in to saveAlso known as 8-gon, octagonal
In geometry, an octagon () is an eight-sided polygon or 8-gon.
An octagon is a shape with eight straight sides and eight angles. You'll encounter octagons in everyday life, like in stop signs and architectural designs, making it a basic geometric form worth understanding.
AI-generated from the Wikipedia summary — may contain errors.
Wikidata facts
Show 5 more facts
- maintained by WikiProject
- WikiProject Mathematics
- has facet polytope
- edge
- Commons category
- Octagons
- different from
- regular octagon
- has vertex figure
- line segment
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~13 min read
Encyclopedic overview
17 sectionsContents
- Properties
- Regularity
- Area
- Circumradius and inradius
- Diagonality
- Construction
- Standard coordinates
- Dissectibility
- Skew
- Petrie polygons
- Symmetry
- Use
- Derived figures
- Related polytopes
- See also
- References
- External links
In geometry, an octagon () 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 truncated octagon, t{8} is a hexadecagon, {16}. A 3D analog of the octagon can be the rhombicuboctahedron with the triangular faces on it like the replaced edges, if one considers the octagon to be a truncated square.
Excerpted from Wikipedia’s “octagon” article, available under the CC BY-SA 4.0 licence.
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