Odpowiedź:
a) [tex]72cm^{2}[/tex] b) [tex]36cm^{2}[/tex] c) [tex]41cm^{2}[/tex]
Szczegółowe wyjaśnienie:
zad.10
a) 3m * 4m = 12[tex]m^{2}[/tex] 12m * 5m = 60[tex]m^{2}[/tex] [tex]12m^{2} + 60m^{2} = 72m^{2}[/tex]
b) 4cm * 3cm = [tex]12cm^{2}[/tex] 4cm * 6cm = 24[tex]cm^{2}[/tex] [tex]12cm^{2} + 24cm^{2} = 36cm^{2}[/tex]
c) 7m * 7m = 49[tex]m^{2}[/tex] 2cm * 2cm = 4[tex]cm^{2}[/tex] 2 * 4[tex]cm^{2}[/tex] = [tex]8cm^{2}[/tex] [tex]49cm^{2} - 8cm^{2} = 41cm^{2}[/tex][tex]41cm^{2}[/tex]
