This is the 9720th most frequent Polish word.
zaprezentowane
"Zaprezentowane" means "presented" in English.
Here, 'zaprezentowane' functions as a past participle describing 'projekty' (projects), used to specify which projects are being referred to: the ones that were presented.
Zaprezentowane projekty zdobyły uznanie publiczności.
The presented projects gained the approval of the audience.
In this sentence, 'zaprezentowane' is part of the passive voice construction referring to 'dzieła' (artworks), indicating the artworks showcased in the gallery.
W galerii zostały zaprezentowane nowe dzieła artysty.
In the gallery, new artworks by the artist were presented.
The word 'zaprezentowane' is used to describe 'pomysły' (ideas), and with 'przez niego' it specifies who presented these ideas.