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Cel mai inteligent răspuns!
2014-06-16T10:34:49+03:00
L=2l
A=lXL=1250
2lxl=1250
2l^2=1250
l^2=625
l=25

L=25x2
L=50

P=l+l+L+L
P=50+50+25+25
P=150

Ca sa aflam diag facem pitagora

DIag^2=25^2+50^2
Diag^2=625+2500
diag^2=3125
diag=25 radical din 5
1 5 1