Her fathemateg wythnosol Gareth Ffowc Roberts, a sgwrs am hen draddodiadau'r Nadolig. Gareth Ffowc Roberts joins Geraint with his weekly maths challenge.
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Her fathemateg wythnosol Gareth Ffowc Roberts, a sgwrs am hen draddodiadau'r Nadolig. Gareth Ffowc Roberts joins Geraint with his weekly maths challenge.
Mae Radio Cymru wedi bod yn darlledu rhaglenni ers 1977. Radio Cymru has been broadcasting to the nation since 1977.
