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Quan expliquem matrius és fàcil anomenar utilitats i observar els seus efectes en moltes aplicacions, però GeoGebra permet observar dinàmicament les matrius i els seus efectes, per exemple, els moviments en el pla.
[color=#9900ff]La matriu unitat transforma els punts en ells[br]mateixa, aquest moviment s’anomena identitat. [color=#ff0000]Mou els punts de la lletra.[/color][/color]