Răspunsuri

2014-10-27T15:21:40+02:00
P dreptunghiului=2(l+L)= 10cm•2+20cm•2=60 cm
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2014-10-27T15:23:39+02:00
P=2L+2l
200mm=20 cm
p=2*10cm+2*20cm=20cm+40cm=60cm
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