![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/6/66/Regular_octagon.svg/langcy-640px-Regular_octagon.svg.png&w=640&q=50)
Octagon
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Polygon wyth ochrog yw octagon mewn geometreg. Cynyrchiolir octagon rheolaidd gan y Symbol schläfli {8}.
Octagon rheolaidd | |
---|---|
![]() Octagon rheolaidd | |
Ymylon a Fertigau | 8 |
Symbol schläfli | {8} t{4} |
Diagram Coxeter–Dynkin | ![]() ![]() ![]() ![]() ![]() ![]() |
Grŵp cymesuredd | Deuhedrol (D8) |
Arwynebedd (gyda t=hyd ymyl) | |
Ongl mewnol (gradd) | 135° |