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calculati perimetrul unui dreptunghi ce are dimensiunile(lungime si latime)
a) L=15 dm,l=6 dm
b) L=2 hm,l=15 dam
c) L=14,2 cm ,l=9 mm


Răspuns :

la a)15*2+6*2=30+12=42dm  la b)2*2+1,5*2=4+3=7 hm transformi dam in hm... la c)142*2+9*2=284+18=302mm transformicm in mm...