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2014-11-13T15:06:51+02:00
A=L·l⇒240=80·l⇒l=240/80=3
P=2(L+l)=2(80+3)=2·83=166cm
2 3 2
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2014-11-13T15:07:11+02:00
A = l*L

A = l*80

240 = l*80

l= 240/80
l = 3cm

Perimetru = 2(l+L)
2(3+80)
2*83 = 166cm
3 5 3