tri deg

== Welsh == === Alternative forms === tri deng === Pronunciation === IPA(key): /ˌtriː ˈdeːɡ/ === Numeral === tri deg (cardinal number, decimal) thirty Synonym: deg ar hugain ==== Usage notes ==== The conditions for using tri deng instead of tri deg are as for using deng instead of deg, except that they are all optional and commonly not applied. === Mutation ===