Răspunsuri

2014-08-08T14:05:20+03:00
P=2l+2L

P=120

2l+2L=120

2(l+L)=120

l+L=120:2

l+L=60

L-6=l

L-6+L=60

2L-6=60

2L=60+6

2L=66

L=66:2

L=33

l=33-6
l=27
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2014-08-08T14:08:07+03:00
 P  dreptunghi = 120 m 
P = 2 ( L + l ) 
L =  l + 6 
120 = 2 ( l + 6 + l  ) 
120 = 4l + 12 
2l = 120 - 12 
l = 108 : 4
l = 27  m 

L = 27 + 6 
L = 33 m . 
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