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P=5m*10m
P=50m
P=a*a
P=5m*5m
P=25m
25+50=75m^2
B)P2=a*b
P=20*8
P=160m^2
P1=3*10
P=30cm^2
P2=160-30=130cm2
Mam nadzieje ze dobrze :)