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dreptinghi L de 5 cm si l de 20 mm aflati aria si perimetrul (aria in meetri patrati

Răspuns :

100 cm =1 m 5 cm. ..l L=5/100=1/20 m l=20 mm=20*10^-3=2/100=1/50 m A=Lxl=1/20×1/50=1/1000=10^-3=0.001 m patrati