Sigma

Yr wyddor Roeg
Α α Alffa	Ν ν Nu
Β β Beta	Ξ ξ Xi
Γ γ Gamma	Ο ο Omicron
Δ δ Delta	Π π Pi
Ε ε Epsilon	Ρ ρ Rho
Ζ ζ Zeta	Σ σ ς Sigma
Η η Eta	Τ τ Tau
Θ θ Theta	Υ υ Upsilon
Ι ι Iota	Φ φ Ffi
Κ κ Kappa	Χ χ Chi
Λ λ Lambda	Ψ ψ Psi
Μ μ Mu	Ω ω Omega
Llythrennau Hynafol
Ϝ ϝ Fau	Ϻ ϻ San
Ϛ ϛ Stigma	Ϟ ϟ Qoppa
Ͱ ͱ Heta	Ϡ ϡ Sampi
	Ϸ ϸ Sho

Sigma (priflythyren Σ; llythyren fach σ, neu ς ar orffen y gair) yw'r 18fed lythyren yn yr wyddor Roeg. Yn y system rhifolion Groegaidd, mae ganddi werth o 200.

Eginyn erthygl sydd uchod am iaith. Gallwch helpu Wicipedia drwy ychwanegu ato.

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Sigma

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