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b) dł- 5*10=50m2
sz- 25m
obw= 50*2 + 25*2= 100+50=150m2
c) dł- 5*25=125
sz- 25
obw= 25*2 + 125*2= 50+250=350m2
5cm × 10 + 25cm × 10 = 50cm + 250cm = 300cm
25cm × 25 + 5cm × 25= 650cm + 125cm = 775cm
obwód 1= 60 cm
obwód 2= 300 cm
obwód 3= 775 cm
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