Geometrian, bilunabirrotonda Johnsonen solidoetako bat da (J91).
Bilunabirrotondaa | |
---|---|
Taldea | Johnsonen solidoak J90 – J91 – J92 |
Aurpegi kopurua | 8 hiruki 2 karratu 4 pentagono |
Ertz kopurua | 26 |
Erpin kopurua | 14 |
Erpin-konfigurazioa | 4(3.52) 8(3.4.3.5) 2(3.5.3.5) |
Simetria-taldea | D2h |
Propietateak | Ganbila |
Poliedro duala | - |
Garapena |
Johnsonen solidoak 92 dira; eta Norman Johnson-ek izendatu eta deskribatu zituen, 1966an.
- (Ingelesez) Weisstein, Eric W.: "Bilunabirotunda" MathWorld-en.
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