Annoncer belong to the 1st
group. Annoncer is a common french verb.
Annoncer is conjugated the same way that verbs that end in : -cer
Annoncer is conjugated with auxiliary avoir
Annoncer verb is
French verb annoncer can be conjugated in the reflexive form: S'annoncer
verb is a direct transitive verb, so passive voice can be used.