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2014-11-10T20:04:08+02:00
P=2(l+L) unde L=AB=4l deci 36=2*5l deci 5l=36/2=18 deci l=18/5=BC iar AB=4*18/5 iar A=l*L=18/5*4*18/5
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2014-11-10T20:04:37+02:00
2(a+4a)=36
10a=36
a=36/10=3,6
4a= 3,6x4=14,4
aria=3,6 x 14,4=51,84