Area triagoloADC=202,5/3=67,5 h(ADC)=67,5*2/7,5=18 AC=V 18^2+7,5^2=19,5cm
AB=7,5+V 30^2-18^2=7,5+24=31,5 A(ACB)=31,5*18/2=283,5 4*283.5=1134=prod, terreno 2 Ricavo=(1134+202,5)*0,8=1069,20
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