Pdr=1836m
latimea * 3 si jumatate=L
=> latimea *2+ latimea * 3.5*2=1836
latimea*2+latimea*7=1836
latimea*9=1836
latimea= 204
L= 204*3.5= 714
P patrat = 714*4=2856m
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Grafic:
\_\_\ latimea = 2a
\_\_\_\_\_\_\_\ Lungimea= 7a
(latimea+Lungimea)*2=1836
(2a+7a)*2=1836
4a+14a=1836
18a=1836
a=102
latimea=204
Lungimea= 7*102=714 =Latura patrat
P patrat=4*714=2856m