dihedral group
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English[edit]
Etymology[edit]
From di- and -hedron; so called because the polygon, when it can be reflected along certain axes of symmetry, has two faces: its upper side and its underside.
Noun[edit]
dihedral group (plural dihedral groups)
- (group theory) a group of symmetries of a regular polygon
Translations[edit]
group of symmetries of a regular polygon