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2014-11-10T12:43:12+02:00
A=lpatrat
a)   a=(rd2+rd5)la2=2+5=7cmpatrati
b)a=(rd7-rd3)la2=7-3=4 cm patrati
c) a=(2rd3-3)la2=12-9=3 m patrati
d) a=(4x-1)la2=8xla2-2 m patrati
2 5 2