This is the 3395th most frequent Portuguese word.
informadas
"Informed."
Here, 'informadas' is used as an adjective describing the state of the students after receiving relevant information.
As alunas foram bem informadas sobre o tópico.
The students were well informed about the topic.
In this instance, 'informadas' is used as a past participle, attributing the action of informing to the news as carried out by the radio.
As notícias informadas pela rádio foram detalhadas.
The news informed by the radio were detailed.
Here, 'informadas' again acts as a past participle, attributing the conveying of decisions to the act of the board.